US20110104214A1 - Once-a-day oxycodone formulations - Google Patents

Once-a-day oxycodone formulations Download PDF

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Publication number
US20110104214A1
US20110104214A1 US12917148 US91714810A US20110104214A1 US 20110104214 A1 US20110104214 A1 US 20110104214A1 US 12917148 US12917148 US 12917148 US 91714810 A US91714810 A US 91714810A US 20110104214 A1 US20110104214 A1 US 20110104214A1
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oxycodone
release
dosage
form
sustained
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US12917148
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Benjamin Oshlack
Curtis Wright
Derek Prater
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Purdue Pharma LP
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Purdue Pharma LP
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/33Heterocyclic compounds
    • A61K31/395Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine, rifamycins
    • A61K31/435Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine, rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/47Quinolines; Isoquinolines
    • A61K31/485Morphinan derivatives, e.g. morphine, codeine
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/0002Galenical forms characterised by the drug release technique; Application systems commanded by energy
    • A61K9/0004Osmotic delivery systems; Sustained release driven by osmosis, thermal energy or gas
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/14Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/16Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
    • A61K9/1605Excipients; Inactive ingredients
    • A61K9/1617Organic compounds, e.g. phospholipids, fats
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/14Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/16Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
    • A61K9/1605Excipients; Inactive ingredients
    • A61K9/1629Organic macromolecular compounds
    • A61K9/1635Organic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/20Pills, tablets, discs, rods
    • A61K9/2004Excipients; Inactive ingredients
    • A61K9/2022Organic macromolecular compounds
    • A61K9/2027Organic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/20Pills, tablets, discs, rods
    • A61K9/2004Excipients; Inactive ingredients
    • A61K9/2022Organic macromolecular compounds
    • A61K9/2031Organic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, polyethylene oxide, poloxamers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/20Pills, tablets, discs, rods
    • A61K9/2004Excipients; Inactive ingredients
    • A61K9/2022Organic macromolecular compounds
    • A61K9/205Polysaccharides, e.g. alginate, gums; Cyclodextrin
    • A61K9/2054Cellulose; Cellulose derivatives, e.g. hydroxypropyl methylcellulose
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/20Pills, tablets, discs, rods
    • A61K9/2072Pills, tablets, discs, rods characterised by shape, structure or size; Tablets with holes, special break lines or identification marks; Partially coated tablets; Disintegrating flat shaped forms
    • A61K9/2086Layered tablets, e.g. bilayer tablets; Tablets of the type inert core-active coat
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/20Pills, tablets, discs, rods
    • A61K9/2004Excipients; Inactive ingredients
    • A61K9/2013Organic compounds, e.g. phospholipids, fats
    • A61K9/2018Sugars, or sugar alcohols, e.g. lactose, mannitol; Derivatives thereof, e.g. polysorbates

Abstract

The invention is directed to sustained release formulations containing oxycodone or a pharmaceutically acceptable salt thereof which provide a mean C24/Cmax oxycodone ratio of 0.6 to 1.0 or 0.7 to 1 after oral administration at steady state to patients and methods thereof.

Description

  • [0001]
    This application claims benefit of U.S. Provisional Application No. 60/288,211, hied May 2, 2001, the disclosure of which is hereby incorporated by reference.
  • FIELD OF THE INVENTION
  • [0002]
    The invention is directed to sustained release formulations containing oxycodone or a pharmaceutically acceptable salt thereof which is suitable for administration to a patient.
  • BACKGROUND OF THE INVENTION
  • [0003]
    Once-a-day sustained release opioid formulations are disclosed in U.S. Pat. Nos. 5,478,577; 5,672,360; 5,958,459; 6,103,261; 6,143,332; 5,965,161; 5,958,452 and 5,968,551. All documents cited herein, including the foregoing, are incorporated by reference in their entireties for all purposes.
  • SUMMARY AND OBJECTS OF THE INVENTION
  • [0004]
    It is an object of the present invention to provide an oxycodone formulation suitable for once daily administration for effective pain management.
  • [0005]
    It is an object of preferred embodiments of the present invention to provide a pharmaceutically acceptable dosage form for orally administering oxycodone to provide analgesic therapy beyond its relatively short half-life over an extended period of time, and having a duration of pain relief of at least 24-hours.
  • [0006]
    The above objects and others are attained by the present invention, which is directed to a dosage form comprising an analgesically effective amount of oxycodone or a pharmaceutically acceptable salt thereof and a sustained release material, the dosage form providing an analgesic effect for at least about 24 hours after oral administration at steady state to human patients; and the dosage form providing a mean C24/Cmax oxycodone ratio of 0.6 to 1.0 after oral administration at steady state to the patients.
  • [0007]
    In certain embodiments of the invention, the dosage form after administration to patients provides a mean Tmax of oxycodone in-vivo which occurs at about 2 to about 17 hours (e.g., about 2 to about 8 hours) after administration at steady state of the dosage form.
  • [0008]
    In certain embodiments of the invention, the mean Tmax of oxycodone in-vivo occurs at about 6.5 hours to about 17 hours, at about 8 to about 16 hours, at about 10 to about 16 hours, or at about 12 to about 16 hours after administration at steady state of the dosage form.
  • [0009]
    In certain embodiments of the invention, the dosage form provides an analgesic effect for at least about 24 hours after administration of the dosage form to human patients at steady state; and provides a mean C24/Cmax oxycodone ratio of 0.50 to 1.0 after administration at steady state to patients.
  • [0010]
    In certain embodiments of the invention, the dosage form provides an analgesic effect for at least about 24 hours alter administration at steady state to human patients; and provides a mean C24/Cmax oxycodone ratio of 0.60 to 1.0 or 0.7 to 1.0 after administration at steady state to patients. In certain embodiments of the invention, the dosage form provides an in-vitro release rate, of oxycodone or a pharmaceutically acceptable salt thereof, when measured by the USP Basket Method at 100 rpm in 900 ml aqueous buffer at a pH of between 1.6 and 7.2 at 37° C. of from 0% to about 40% at 1 hour, from about 8% to about 70% at 4 hours, from about 20% to about 80% at 8 hours, from about 30% to about 95% at 12 hours, from about 35% to about 95% at 18 hours, and greater than about 50% at 24 hours.
  • [0011]
    In certain preferred embodiments the sustained release oral dosage form of the present invention provides oxycodone plasma levels which are effective for 24 hourly dosing, characterized by a W50 for the oxycodone of between 4 and 24 hours idler administration at steady state. In certain embodiments, the W50 is at least 4 hours, preferably at least 12 hours, and more preferably at least 1.8 hours, after administration at steady state.
  • [0012]
    In certain embodiments the sustained release oral dosage form of the present invention comprises a matrix which includes a sustained release material and oxycodone or a pharmaceutically acceptable salt thereof. In certain embodiments, the matrix is compressed into a tablet and may be optionally overcoated with a coating that in addition to the sustained release material of the matrix may control the release of the oxycodone or pharmaceutically acceptable salt thereof from the formulation, such that blood levels of active ingredient are maintained within the therapeutic range over an extended period of time. In certain alternate embodiments, the matrix is encapsulated.
  • [0013]
    In certain embodiments, the sustained release oral dosage form of the present invention comprises a plurality of pharmaceutically acceptable sustained release matrices comprising oxycodone or a pharmaceutically acceptable salt thereof, the dosage form maintaining the blood plasma levels of oxycodone within the therapeutic range over an extended period of time when administered to patients.
  • [0014]
    Preferably, the formulations prepared in accordance with the present invention can be presented in tablet, capsule, or in any other suitable unit dosage form.
  • [0015]
    In certain embodiments the sustained release oral dosage form of the present invention is an osmotic dosage form which comprises a single layer or bilayer core comprising oxycodone or a pharmaceutically acceptable salt thereof; an expandable polymer; a semipermeable membrane surrounding the core; and a passageway disposed in the semipermeable membrane for sustained release of the oxycodone or pharmaceutically acceptable salt thereof, such that blood levels of active ingredient are maintained within the therapeutic range over an extended period of time when administered to patients.
  • [0016]
    In certain embodiments the sustained release oral dosage form of the present invention comprises a substantially homogenous core comprising oxycodone or a pharmaceutically acceptable salt thereof and an expandable polymer; a semipermeable membrane surrounding the core; and a passageway disposed in the semipermeable membrane for sustained release of the oxycodone or pharmaceutically acceptable salt thereof; such that blood levels of active ingredient are maintained within the therapeutic range over an extended period of time when administered to a patients.
  • [0017]
    In certain embodiments of the present invention, there is provided a method of treating pain associated conditions in patients requiring such treatment which method includes administering to a patient an effective amount of oxycodone or a pharmaceutically acceptable salt thereof in a sustained release dosage form as described herein.
  • [0018]
    In certain embodiments, the invention is directed to the use of a sustained release dosage form comprising a pharmaceutically acceptable matrix comprising oxycodone or a pharmaceutically acceptable salt thereof and a sustained release material in the production of an analgesic preparation for oral administration to human patients on a once a day basis, to provide an analgesic effect for at least about 24 hours and a mean oxycodone ratio of 0.6 to 1.0 after administration at steady state to said patients.
  • [0019]
    In certain embodiments, the invention is directed to the use of a sustained release oral dosage form comprising a bilayer core comprising a drug layer comprising an analgesically effective amount of oxycodone or a pharmaceutically acceptable salt thereof; and a displacement layer comprising an osmopolymer, and a semipermeable wall surrounding the bilayer core having a passageway disposed therein for the release of said oxycodone, or pharmaceutically acceptable salt thereof; in the production of an analgesic preparation for oral administration to human patients to provide an analgesic effect at least about 24 hours after oral administration at steady state to human patients; and to provide a mean C24/Cmax oxycodone ratio of 0.6 to 1.0 after administration at steady state to said patients.
  • [0020]
    In certain embodiments, the invention is directed to the use of a sustained release dosage form comprising a plurality of sustained release matrices comprising oxycodone or a pharmaceutically acceptable salt thereof and a sustained release material, in the production of an analgesic preparation for oral administration to a patient on a once-a-day basis, to provide an analgesic effect for at least 24 hours after oral administration at steady state to human patients; and to provide a mean C24/Cmax oxycodone ration of 0.6 to 1.0 after oral administration at steady state to said patients.
  • [0021]
    The term “Cmax” as it is used herein is the highest plasma concentration of the drug attained within the dosing interval.
  • [0022]
    The term “C24” as it is used herein is the plasma concentration of the drug at 24 hours after administration.
  • [0023]
    The term “Tmax” as it is used herein is the time period which elapses after administration of the dosage form until the plasma concentration of the drug attains the highest plasma concentration within the dosing interval.
  • [0024]
    The term “W50” for purposes of the present invention is the duration over which the plasma concentrations are equal to or greater than 50% of the peak concentration. The parameter is determined by linear interpolation of the observed data and represents the difference in time between the first (or only) upslope crossing and the last (or only) downslope crossing in the plasma profile.
  • [0025]
    The term “C24/Cmax ratio” is defined for purposes of the present invention as the ratio of the plasma concentration of the drug at 24 hours after administration to the highest plasma concentration of the drug attained within the dosing interval.
  • [0026]
    The term “USP Basket Method” is the Basket Method described in U.S. Pharmacopoeia XXII (1990), herein incorporated by reference.
  • [0027]
    The term “steady state” means that the amount of the drug reaching the system is approximately the same as the amount of the drug leaving the system. Thus, at “steady-state”, the patient's body eliminates the drug at approximately the same rate that the drug becomes available to the patient's system through absorption into the blood stream.
  • [0028]
    The term “semipermeable wall” for purposes of the present invention means that the wall is permeable to the passage of an exterior fluid, such as aqueous or biological fluid, in the environment of use, including the gastrointestinal tract, but impermeable to drug.
  • [0029]
    The term “expandable polymer” for purposes of the present invention means a polymer which upon exposure to an aqueous or biological fluid, absorbs the fluid resulting in a greater mass.
  • [0030]
    The term “mean” for purposes of the present invention, when used to define a pharmacokinetic value (e.g., Tmax) represents the arithmetic mean value measured across a patient population.
  • [0031]
    The phrase “pharmaceutically acceptable salt” includes, but is not limited to, metal salts such as sodium salt, potassium salt, cesium salt and the like; alkaline earth metals such as calcium salt, magnesium salt and the like; organic amine salts such as triethylamine salt, pyridine salt, picoline salt, ethanolamine salt, triethanolamine salt, dicyclohexylamine salt, N,N′-dibenzylethylenediamine salt, and the like; inorganic acid salts such as hydrochloride, hydrobromide, sulfate, phosphate and the like; organic acid salts such as formate, acetate, trifluoroacetate, maleate, fumarate, tartrate and the like; sulfonates such as methanesulfonate, benzenesulfonate, p-toluenesulfonate, and the like; amino acid salts such as alginate, asparginate, glutamate and the like.
  • DESCRIPTION OF THE INVENTION
  • [0032]
    In certain embodiments of the present invention, the sustained release dosage form provides an in-vitro release rate of oxycodone or a pharmaceutically acceptable salt thereof, when measured by the USP Basket Method at 100 rpm in 900 ml aqueous buffer at a pH of between 1.6 and 7.2 at 37° C. of from 0% to about 40% at 1 hour, from about 8% to about 70% at 4 hours, from about 24% to about 80% at 8 hours, from about 30% to about 95% at 12 hours, from about 35% to about 95% at 18 his, and greater than about 50% at 24 hours.
  • [0033]
    In certain embodiments of the present invention the time period during which oxycodone blood levels (after administration at steady state) are greater than or equal to 75% of the maximum blood level (T≧0.75Cmax) may be 4 hours or greater, preferably 6 hours or greater.
  • [0034]
    In certain embodiments, the time at which oxycodone blood levels reach their maximum concentration (Tmax), is about 2 to about 17 hours, preferably about 6.5 hours to about 17 hours, more preferably about 8 to about 16 hours, and even more preferably about 10 to about 16 or about 12 to about 16 hours after administration at steady state oldie dosage form.
  • [0035]
    In certain embodiments of the present invention, the dosage form provides a C24/Cmax ratio after administration at steady state of 0.6 to 1.0, a ratio 0.7 to 0.99 or a ratio of 0.8 to 0.95. In other embodiments of the present invention, the dosage form provides a C24/Cmax ratio after administration at steady state of 0.7 to 1.0, a ratio 0.72 to 0.99 or a ratio of 0.74 to 0.95.
  • [0036]
    In certain embodiments of the present invention, the dosage form provides a C24/Cmax ratio after administration at steady state of 0.6 to 1.0, a ratio 0.7 to 0.99 or a ratio of 0.8 to 0.95 and a (Tmax) of about 6.5 hours to about 17 hours, about 8 to about 16 hours, about 10 to about 16 hours or about 12 hours to about 16 hours. In other embodiments of the present invention, the dosage form provides a C24/Cmax ratio after administration at steady state of 0.7 to 1.0, a ratio 0.72 to 0.99 or a ratio of 0.74 to 0.95 and a (Tmax) in about 2 to about 17 hours.
  • [0037]
    In certain embodiments of the present invention, the Co-administration of food will not significantly increase or decrease the extent of oxycodone absorption.
  • [0038]
    The sustained release oral dosage form of the present invention includes from about 1 to about 640 mg of oxycodone or a pharmaceutically acceptable salt thereof (e.g., oxycodone hydrochloride). Preferably the sustained release oral dosage form of the present invention includes from about 5 to about 500 mg oxycodone or a pharmaceutically acceptable salt thereof, more preferably from about 10 to about 320 mg oxycodone or a pharmaceutically acceptable salt thereof and even more preferably from about 10 to about 160 mg oxycodone or a pharmaceutically acceptable salt thereof.
  • [0039]
    In other preferred embodiments, the sustained release dosage form of the present invention comprises from about 10 to about 160 mg oxycodone hydrochloride or an equivalent amount of oxycodone or a pharmaceutically acceptable salt thereof other than the hydrochloride salt.
  • [0040]
    The present invention includes a method for administering from about 1 to about 640 mg of oxycodone or a pharmaceutically acceptable salt thereof on a once-a-day basis to a patient in need of relief of pain, in accordance with the pharmacokinetic parameters disclosed herein. Preferably, the method includes administering from about 5 to about 500 mg oxycodone or a pharmaceutically acceptable salt thereof.
  • [0041]
    The method of administration according to the present invention is particularly applicable to the treatment of acute and chronic pain, particularly pain associated with terminal disease such as cancer; chronic backpain; and post-operative pain.
  • Dosage Forms
  • [0042]
    In certain embodiments the oral dosage form includes a sustained-release material which is incorporated into a matrix along with the oxycodone or pharmaceutically acceptable salt thereof to provide for the sustained release of the oxycodone. The sustained-release material may be hydrophobic or hydrophilic as desired. The oral dosage form of the present invention may be prepared as granules, spheroids, matrix multiparticulates, etc. which comprise oxycodone or a pharmaceutically acceptable salt thereof in a sustained release matrix, which may be compressed into a tablet or encapsulated. The oral dosage form of the present invention may optionally include other pharmaceutically acceptable ingredients (e.g., diluents, binders, colorants, lubricants, etc.).
  • [0043]
    In certain embodiments, the oral dosage form of the present invention may be an osmotic dosage form having a push or displacement composition as one of the layers of a bilayer core for pushing oxycodone or a pharmaceutically acceptable salt thereof from the dosage form, and a semipermeable wall composition surrounding the core, wherein the wall has at least one exit means or passageway for delivering the oxycodone from the dosage forth. Alternatively, the core of the osmotic dosage form may comprise a single layer core including a controlled release polymer and oxycodone or a pharmaceutically acceptable salt thereof.
  • [0044]
    Preferably the dosage forms of the present invention provide an analgesic effect for at least about 24 hours after administration.
  • Sustained Release Matrix Formulations
  • [0045]
    In one preferred embodiment of the present invention, the sustained release carrier may be incorporated into a matrix with the oxycodone or pharmaceutically acceptable salt thereof which matrix provides for the sustained release of the oxycodone.
  • [0046]
    A non-limiting list of suitable sustained-release materials which may be included in a sustained-release matrix according to the invention include hydrophilic and/or hydrophobic materials, such as gums, cellulose ethers, acrylic resins, protein derived materials, waxes, shellac, and oils such as hydrogenated castor oil and hydrogenated vegetable oil. However, any pharmaceutically acceptable hydrophobic or hydrophilic sustained-release material which is capable of imparting sustained-release of the oxycodone or pharmaceutically acceptable salt thereof may be used in accordance with the present invention. Preferred sustained-release polymers include alkylcelluloses such as ethylcellulose, acrylic and methacrylic acid polymers and copolymers; and cellulose ethers, especially hydroxyalkylcelluloses (especially hydroxypropylmethylcellulose) and carboxyalkylcelluloses. Preferred acrylic and methacrylic acid polymers and copolymers include methyl methacrylate, methyl methacrylate copolymers, ethoxyethyl methacrylates, ethyl acrylate, trimethyl aminoethyl methacrylate, cyanoethyl methacrylate, aminoalkyl methacrylate copolymer, poly(acrylic acid), poly(methacrylic acid), methacrylic acid alkylamine copolymer, poly(methyl methacrylate), poly(methacrylic acid) (anhydride), polymethacrylate, polyacrylamide, poly(methacrylic acid anhydride), and glycidyl methacrylate copolymers. Certain preferred embodiments utilize mixtures of any of the foregoing sustained-release materials in the matrix of the invention.
  • [0047]
    The matrix also may include a binder. In such embodiments, the binder preferably contributes to the sustained-release of the oxycodone or pharmaceutically acceptable salt thereof from the sustained-release matrix.
  • [0048]
    If an additional hydrophobic binder material is included, it is preferably selected from natural and synthetic waxes, fatty acids, fatty alcohols, and mixtures of the same. Examples include beeswax, carnauba wax, stearic acid and stearyl alcohol. This list is not meant to be exclusive. In certain preferred embodiments, a combination of two or more hydrophobic binder materials are included in the matrix formulations.
  • [0049]
    Preferred hydrophobic binder materials which may be used in accordance with the present invention include digestible, long chain (C8-C50, especially C12C40), substituted or unsubstituted hydrocarbons, such as fatty acids, fatty alcohols, glyceryl esters of fatty acids, mineral and vegetable oils, natural and synthetic waxes and polyalkylene glycols, Hydrocarbons having a melting point of between 25° and 90° C. are preferred. Of the long-chain hydrocarbon binder materials, fatty (aliphatic) alcohols are preferred in certain embodiments. The oral dosage form may contain up to 80% (by weight) of at least one digestible, long chain hydrocarbon.
  • [0050]
    In certain embodiments, the hydrophobic binder material may comprise natural or synthetic waxes, fatty alcohols (such as lauryl, myristyl, stearyl, cetyl or preferably cetostearyl alcohol), fatty acids, including but not limited to fatty acid esters, fatty acid glycerides (mono-, di-, and tri-glycerides), hydrogenated fats, hydrocarbons, normal waxes, stearic acid, stearyl alcohol and hydrophobic and hydrophilic materials having hydrocarbon backbones. Suitable waxes include, for example, beeswax, glycowax, castor wax and carnauba wax. For purposes of the present invention, a wax-like substance is defined as any material which is normally solid at room temperature and his a melting point of from about 30 to about 100° C. In certain preferred embodiments, the dosage form comprises a sustained release matrix comprising oxycodone or a pharmaceutically acceptable salt thereof and at least one water soluble hydroxyalkyl cellulose, at least one C12-C36, preferably C14-C22, aliphatic alcohol and, optionally, at least one polyalkylene glycol. The hydroxyalkyl cellulose is preferably a hydroxy (C1 to C6) alkyl cellulose, such as hydroxypropylcellulose, hydroxypropylmethylcellulose and, especially, hydroxyethyl cellulose. The amount of the at least one hydroxyalkyl cellulose in the present oral dosage form may be determined, inter alia, by the precise rate of oxycodone or oxycodone salt release required. The aliphatic alcohol may be, for example, lauryl alcohol, myristyl alcohol or stearyl alcohol. In particularly preferred embodiments of the present oral dosage form, however, the at least one aliphatic alcohol is cetyl alcohol or cetostearyl alcohol. The amount of the aliphatic alcohol in the present oral dosage form may be determined, as above, by the precise rate of oxycodone or oxycodone salt release required. It may also depend on whether at least one polyalkylene glycol is present in or absent from the oral dosage form. In the absence of at least one polyalkylene glycol, the oral dosage form preferably contains between about 20% and about 50% (by wt) of the aliphatic alcohol. When a polyalkylene glycol is present in the oral dosage form, then the combined weight of the aliphatic alcohol and the polyalkylene glycol preferably constitutes between about 20% and about 50% (by wt) of the total dosage form.
  • [0051]
    In one preferred embodiment, the ratio of, e.g., the at least one hydroxyalkyl cellulose or acrylic resin to the at least one aliphatic alcohol/polyalkylene glycol determines, to a considerable extent, the release rate of the oxycodone or oxycodone salt from the formulation. In certain embodiments, a ratio of the hydroxyalkyl cellulose to the aliphatic alcohol/polyalkylene glycol of between 1:1 and 1:4 is preferred, with a ratio of between 1:2 and 1:3 being particularly preferred.
  • [0052]
    In certain embodiments, the polyalkylene glycol may be, for example, polypropylene glycol, or polyethylene glycol which is preferred. The average molecular weight of the at least, one polyalkylene glycol is preferably between 1,000 and 15,000, especially between 1,500 and 12,000.
  • [0053]
    Another suitable sustained-release matrix comprises an alkylcellulose (especially ethylcellulose), a C12 to C35 aliphatic alcohol and, optionally, a polyalkylene glycol.
  • [0054]
    In addition to the above ingredients, a sustained-release matrix may also contain suitable quantities of other Materials, e.g., diluents, lubricants, binders, granulating aids, colorants, flavorants and glidants that are conventional in the pharmaceutical art.
  • [0055]
    In order to facilitate the preparation of a solid, sustained-release oral dosage form according to this invention them is provided, in a further aspect of the present invention, a process for the preparation of a solid, sustained-release oral dosage form according to the present invention comprising incorporating oxycodone or a salt thereof in a sustained-release matrix incorporation in the matrix may be effected, for example, by:
  • [0056]
    (a) forming granules comprising at least one hydrophobic and/or hydrophilic material as set forth above (e.g., a water soluble hydroxyalkyl cellulose) together with the oxycodone or pharmaceutically acceptable salt thereof;
  • [0057]
    (b) mixing the at least one hydrophobic and/or hydrophilic material-containing granules with at least one C12-C36 aliphatic alcohol, and
  • [0058]
    (c) optionally, compressing and shaping the granules.
  • [0059]
    The granules may be formed by any of the procedures well-known to those skilled in the art of pharmaceutical formulation. For example, in one preferred method, the granules may be formed by wet granulating hydroxyalkyl cellulose/oxycodone or oxycodone salt with water. In a particularly preferred embodiment of this process, the amount of water added during the wet granulation step is preferably between 1.5 and 5 times, especially between 1.75 and 3.5 times, the dry weight of the oxycodone or oxycodone salt.
  • [0060]
    A sustained-release matrix can also be prepared by, e.g., melt-granulation or melt-extrusion techniques. Generally, melt-granulation techniques involve melting a normally solid hydrophobic binder material, e.g., a wax, and incorporating a powdered drug therein. To obtain a sustained release dosage form, it may be necessary to incorporate a hydrophobic sustained-release material; e.g. ethylcellulose or a water-insoluble acrylic polymer, into the molten wax hydrophobic binder material. Examples of sustained-release formulations prepared via melt-granulation techniques are found, e.g., in U.S. Pat. No. 4,861,598.
  • [0061]
    The additional hydrophobic binder material may comprise one or more water-insoluble wax-like thermoplastic substances possibly mixed with one or more wax-like thermoplastic substances being less hydrophobic than said one or more water-insoluble wax-like substances. In order to achieve sustained release, the individual wax-like substances in the formulation should be substantially non-degradable and insoluble in gastrointestinal fluids during the initial release phases. Useful water-insoluble wax-like binder substances may be those with a water-solubility that is lower than about 1:5,000 (w/w).
  • [0062]
    The preparation of a suitable melt-extruded matrix according to the present invention may, for example, include the steps of blending the oxycodone or pharmaceutically acceptable salt thereof, together with a sustained release material and preferably a binder material to obtain a homogeneous mixture. The homogeneous mixture is then heated to a temperature sufficient to at least soften the mixture sufficiently to extrude the same. The resulting homogeneous mixture is then extruded, e.g., using a twin-screw extruder, to form strands. The extrudate is preferably cooled and cut into multiparticulates by any means known in the art. The matrix multiparticulates are then divided into unit doses. The extrudate preferably has a diameter of from about 0.1 to about 5 mm and provides sustained release of the oxycodone or pharmaceutically acceptable salt thereof for a time period of at least about 24 hours.
  • [0063]
    An optional process for preparing the melt extruded formulations of the present invention includes directly metering into an extruder a hydrophobic sustained release material, the oxycodone or salt thereof, and an optional binder material; beating the homogenous mixture; extruding the homogenous mixture to thereby form strands; cooling the strands containing the homogeneous mixture; cutting the strands into matrix multiparticulates having a size from about 0.1 mm to about 12 mm; and dividing said particles into unit doses. In this aspect of the invention, a relatively continuous manufacturing procedure is realized.
  • [0064]
    Plasticizers, such as those described above, may be included in melt-extruded matrices. The plasticizer is preferably included as from about 0.1 to about 30% by weight of the matrix. Other pharmaceutical excipients, e.g., talc, mono or poly saccharides, colorants, flavorants, lubricants and the like may be included in the sustained release matrices of the present invention as desired. The amounts included will depend upon the desired characteristic to be achieved.
  • [0065]
    The diameter of the extruder aperture or exit port can be adjusted to vary the thickness of the extruded strands. Furthermore, the exit part of the extruder need not be round; it can be oblong, rectangular, etc. The exiting strands can be reduced to particles using a hot wire cutter, guillotine, etc.
  • [0066]
    A melt extruded matrix multiparticulate system can be, for example, in the form of granules, spheroids or pellets depending upon the extruder exit orifice. For purposes of the present invention, the terms “melt-extruded matrix multiparticulate(s)” and “melt-extruded matrix multiparticulate system(s)” and “melt-extruded matrix particles” shall refer to a plurality of units, preferably within a range of similar size and/or shape and containing one or more active agents and one or more excipients, preferably including a hydrophobic sustained release material as described herein. Preferably the melt-extruded matrix multiparticulates will be of a range of from about 0.1 to about 12 mm in length and have a diameter of from about 0.1 to about 5 mm. In addition, it is to be understood that the melt-extruded matrix multiparticulates can be any geometrical shape within this size range. In certain embodiments, the extrudate may simply be cut into desired lengths and divided into unit doses of the therapeutically active agent without the need of a spheronization step.
  • [0067]
    In one preferred embodiment, oral dosage forms are prepared that include an effective amount of melt-extruded matrix multiparticulates within a capsule. For example, a plurality of the melt-extruded matrix multiparticulates may be placed in a gelatin capsule in an amount sufficient to provide an effective sustained release dose when ingested and contacted by gastrointestinal fluid.
  • [0068]
    In another embodiment, a suitable amount of the multiparticulate extrudate is compressed into an oral tablet using conventional tableting equipment using standard techniques. Techniques and compositions for making tablets (compressed and molded), capsules (hard and soft gelatin) and pills are also described in Remington's Pharmaceutical Sciences, (Arthur Osol, editor), 1553-1593 (1980).
  • [0069]
    In yet another preferred embodiment, the extrudate can be shaped into tablets as set forth in U.S. Pat. No. 4,957,681 (Klimesch, et. al.).
  • [0070]
    Optionally, the sustained-release matrix multiparticulate systems, tablets, or capsules can be coated with a sustained release coating such as the sustained release coatings described herein. Such coatings preferably include a sufficient amount of hydrophobic and/or hydrophilic sustained-release material to obtain a weight gain level from about 2 to about 25 percent, although the overcoat may be greater depending upon, e.g., the desired release rate.
  • [0071]
    The dosage forms of the present invention may further include combinations of melt-extruded matrix multiparticulates containing oxycodone or pharmaceutically acceptable salt thereof. Furthermore, the dosage forms can also include an amount of an immediate release therapeutically active oxycodone or pharmaceutically acceptable salt thereof for prompt therapeutic effect. The immediate release oxycodone or pharmaceutically acceptable salt thereof may be incorporated, e.g., as separate multiparticulates within a gelatin capsule, or may be coated on the surface of, e.g., melt extruded matrix multiparticulates.
  • [0072]
    The sustained-release profile of the melt-extruded formulations of the invention can be altered, for example, by varying the amount of sustained-release material, by varying the amount of plasticizer relative to other matrix constituents, by varying the amount of hydrophobic material, by the inclusion of additional ingredients or excipients, by altering the method of manufacture, etc.
  • [0073]
    In other embodiments of the invention, melt-extruded formulations are prepared without the inclusion of the oxycodone or pharmaceutically acceptable salt thereof, which is added thereafter to the extrudate. Such formulations typically will have the oxycodone or pharmaceutically acceptable salt thereof blended together with the extruded matrix material, and then the mixture would be tableted in order to provide a slow release formulation. Such formulations may be advantageous, for example, when the therapeutically active agent included in the formulation is sensitive to temperatures needed for softening the hydrophobic material and/or the retardant material.
  • [0074]
    Typical melt-extrusion production systems suitable for use in accordance with the present invention include a suitable extruder drive motor having variable speed and constant torque control, start-stop controls, and ammeter. In addition, the production system will include a temperature control console which includes temperature sensors, cooling means and temperature indicators throughout the length of the extruder. In addition, the production system will include an extruder such as a twin-screw extruder which consists of two counter-rotating intermeshing screws enclosed within a cylinder or barrel having an aperture or die at the exit thereof. The feed materials enter through a feed hopper and are moved through the barrel by the screws and are forced through the die into strands which are thereafter conveyed such as by a continuous movable belt to allow for cooling and being directed to a pelletizer or other suitable device to render the extruded ropes into the matrix multiparticulate system. The pelletizer can consist of rollers, fixed knife, rotating cutter and the like. Suitable instruments and systems are available from distributors such as C.W. Brabender Instruments, Inc, of South Hackensack, N.J. Other suitable apparatus will be apparent to those of ordinary skill in the art.
  • [0075]
    A further aspect of the invention is related to the preparation of melt-extruded matrix multiparticulates as set forth above in a manner which controls the amount of air included in the extruded product. By controlling the amount of air included in the extrudate, the release rate of the oxycodone or therapeutically acceptable salt thereof may be altered.
  • [0076]
    Thus, in a further aspect of the invention, the melt-extruded product is prepared in a manner which substantially excludes air during the extrusion phase of the process. This may be accomplished, for example, by using a Leistritz extruder having a vacuum attachment. The extruded matrix multiparticulates prepared according to the invention using the Leistritz extruder under vacuum provides a melt-extruded product having different physical characteristics. In particular, the extrudate is substantially non-porous when magnified, e.g., using a scanning electron microscope which provides an SEM (scanning electron micrograph). Such substantially non-porous formulations may provide a faster release of the therapeutically active agent, relative to the same formulation prepared without vacuum. SEMs of the matrix multiparticulates prepared using an extruder under vacuum appear very smooth, and the multiparticulates tend to be more robust than those multiparticulates prepared without vacuum. It has been observed that in at least certain formulations, the use of extrusion under vacuum provides an extruded matrix multiparticulate product which is more pH-dependent than its counterpart formulation prepared without vacuum.
  • [0077]
    Alternatively, the melt-extruded product is prepared using a Werner-Pfleiderer twin screw extruder.
  • [0078]
    In certain embodiments, a spheronizing agent is added to a granulate or matrix multiparticulate and then spheronized to produce sustained release spheroids. The spheroids are then optionally overcoated with a sustained release coating by methods such as those described above.
  • [0079]
    Spheronizing agents which may be used to prepare the matrix multiparticulate formulations of the present invention include any art-known spheronizing agent. Cellulose derivatives are preferred, and microcrystalline cellulose is especially preferred. A suitable microcrystalline cellulose is, for example, the material sold as Avicel PH 101 (TradeMark, FMC Corporation). The spheronizing agent is preferably included as about 1 to about 99% of the matrix multiparticulate by weight.
  • [0080]
    In certain embodiments, in addition to the active ingredient and spheronizing agent, the spheroids may also contain a binder. Suitable binders, such as low viscosity, water soluble polymers, will be well known to those skilled in the pharmaceutical art. However, water soluble hydroxy lower alkyl cellulose, such as hydroxy propyl cellulose, are preferred. Additionally (or alternatively) the spheroids may contain a water insoluble polymer, especially an acrylic polymer, an acrylic copolymer, such as a methacrylic acid-ethyl acrylate copolymer, or ethyl cellulose.
  • [0081]
    In certain embodiments, a sustained release coating is applied to the sustained release spheroids, granules, or matrix multiparticulates. In such embodiments, the sustained-release coating may include a water insoluble material such as (a) a wax, either alone or in admixture with a fatty alcohol; or (b) shellac or zein. The coating is preferably derived from an aqueous dispersion of the hydrophobic sustained release material.
  • [0082]
    In certain embodiments, it is necessary to overcoat the sustained release spheroids, granules, or matrix multiparticulates comprising the oxycodone or pharmaceutically acceptable salt thereof and sustained release carrier with a sufficient amount of the aqueous dispersion of, e.g., alkylcellulose or acrylic polymer, to obtain a weight gain level from about 2 to about 50%, e.g., about 2 to about 25%, in, order to obtain a sustained-release formulation. The overcoat may be lesser or greater depending upon, e.g., the desired release rate, the inclusion of plasticizer in the aqueous dispersion and the manner of incorporation of the same. Cellulosic materials and polymers, including alkylcelluloses, are sustained release materials well suited for coating the sustained release spheroids, granules, or matrix multiparticulates according to the invention. Simply by way of example, one preferred alkylcellulosic polymer is ethylcellulose, although the artisan will appreciate that other cellulose and/or alkylcellulose polymers may be readily employed, singly or in any combination, as all or part of a hydrophobic coating according to the invention.
  • [0083]
    One commercially-available aqueous dispersion of ethylcellulose is Aquacoat® (FMC Corp., Philadelphia, Pa., U.S.A.). Aquacoat® is prepared by dissolving the ethylcellulose in a water-immiscible organic solvent and then emulsifying the same in water in the presence of a surfactant and a stabilizer. After homogenization to generate submicron droplets, the organic solvent is evaporated under vacuum to form a pseudolatex. The plasticizer is not incorporated in the pseudolatex during the manufacturing phase. Thus, prior to using the same as a coating, it is necessary to intimately mix the Aquacoat® with a suitable plasticizer prior to use.
  • [0084]
    Another aqueous dispersion of ethylcellulose is commercially available as Surelease® (Coleman, Inc., West Point, Pa., U.S.A.). This product is prepared by incorporating plasticizer into the dispersion during the manufacturing process. A hot melt of a polymer, plasticizer (dibutyl sebacate), and stabilizer (oleic acid) is prepared as a homogeneous mixture, which is then diluted with an alkaline solution to obtain an aqueous dispersion which can be applied directly to the sustained release spheroids, granules, or matrix multiparticulates.
  • [0085]
    In other preferred embodiments of the present invention, the sustained release material comprising the sustained-release coating is a pharmaceutically acceptable acrylic polymer, including but not limited to acrylic acid and methacrylic acid copolymers, methyl methacrylate copolymers, ethoxyethyl methacrylates, cyanoethyl methacrylate, poly(acrylic acid), poly(methacrylic acid), methacrylic acid alkylamide copolymer, poly(methyl methacrylate), polymethacrylate, poly(methyl methacrylate) copolymer, polyacrylamide, aminoalkyl methacrylate copolymer, poly(methacrylic acid anhydride), and glycidyl methacrylate copolymers.
  • [0086]
    In certain preferred embodiments, the acrylic polymer is comprised of one or more ammonia methacrylate copolymers. Ammonio methacrylate copolymers are, well known in the art, and are described in the National Formulary (NE) XVII as fully polymerized copolymers of acrylic and methacrylic acid esters with, a low content of quaternary ammonium groups. In order to obtain a desirable dissolution profile, it may be necessary to incorporate two or more ammonia methacrylate copolymers having differing physical properties, such as different molar ratios of the quaternary ammonium groups to the neutral (meth) acrylic esters.
  • [0087]
    Certain methacrylic acid ester-type polymers are useful for preparing pH-dependent coatings which may be used in accordance with the present invention. For example, there are a family of copolymers synthesized from diethylaminoethyl methacrylate and other neutral methacrylic esters, also known as methacrylic acid copolymer or polymeric methacrylates, commercially available as Eudragit® from Rabin GMBH and Co. Kg Darmstadt, Germany. There are several different types of Eudragit®. For example, Eudragit E is an example of a methacrylic acid copolymer which swells and dissolves in acidic media. Eudragit L is a methacrylic acid copolymer which does not swell at about pH<5.7 and is soluble at about pH>6. Eudragit S does not swell at about pH<6.5 and is soluble at about pH>7. Eudragit RL and Eudragit RS are water swellable, and the amount of water absorbed by these polymers is pH-dependent; however, dosage forms coated with Eudragit RL and RS are pH-independent.
  • [0088]
    In certain preferred embodiments, the acrylic coating comprises a mixture of two acrylic resin lacquers commercially available from Rohm under the Tradenames Eudragit® RL30D and Eudragite RS30D, respectively. Endragite RL30D and Eudragit® RS30D are copolymers of acrylic and methacrylic esters with a low content of quaternary ammonium groups, the molar ratio of ammonium groups to the remaining neutral (meth)acrylic esters being 1:20 in Eudragit® RL30D and 1:40 in Eudragit® RS30D. The mean molecular weight is about 150,000. The code designations RL (high permeability) and RS (low permeability) refer to the permeability properties of these agents. Eudragit® RL/RS mixtures are insoluble in water and in digestive fluids. However, coatings formed from the same are swellable and permeable in aqueous solutions and digestive fluids.
  • [0089]
    The Eudragit® RL/RS dispersions of the present invention may be mixed together in any desired ratio in order to ultimately obtain a sustained-release formulation having a desirable dissolution profile. Desirable sustained-release formulations may be obtained, for instance, from a retardant coating derived from 100% Eudragit® RL, 50% Eudragit® RL and 50% Eudragit® RS, and 10% Eudragit® RL:Eudragit® 90% RS. Of course, one skilled in the art will recognize that other acrylic polymers may also be used, such as, for example, Eudragit® L. In embodiments of the present invention where the coating comprises an aqueous dispersion of a hydrophobic sustained release material, the inclusion of an effective amount of a plasticizer in the aqueous dispersion of hydrophobic material will further improve the physical properties of the sustained-release coating. For example, because ethyl-cellulose has a relatively high glass transition temperature and does not form flexible films under normal coating conditions, it is preferable to incorporate a plasticizer into an ethylcellulose coating containing sustained-release coating before using the same as a coating material. Generally, the amount of plasticizer included in a coating solution is based on the concentration of the film-former, e.g., most often from about 1 to about 50 percent by weight of the film-former. Concentration of the plasticizer, however, can only be properly determined after careful experimentation with the particular coating solution and method of application.
  • [0090]
    Examples of suitable plasticizers for ethylcellulose include water insoluble plasticizers such as dibutyl sebacate, diethyl phthalate, triethyl citrate, tributyl citrate, and triacetin, although it is possible that other water-insoluble plasticizers (such as acetylated monoglycerides, phthalate esters, castor oil, etc.) may be used. Triethyl citrate is an especially preferred plasticizer for the aqueous dispersions of ethyl cellulose of the present invention.
  • [0091]
    Examples of suitable plasticizers for the acrylic polymers of the present invention include, but are not limited to citric acid esters such as triethyl citrate NF XVI, tributyl citrate, dibutyl phthalate, and possibly 1,2-propylene glycol. Other plasticizers which have proved to be suitable for enhancing the elasticity of the films formed from acrylic films such as Eudragit® R1/RS lacquer solutions include polyethylene glycols, propylene glycol, diethyl phthalate, castor oil, and triacetin. Triethyl citrate is an especially preferred plasticizer for the aqueous dispersions of ethyl cellulose of the present invention.
  • [0092]
    In certain embodiments, the uncoated/coated sustained release spheroids, granules, or matrix multiparticulates containing the oxycodone or oxycodone salt are cured until an endpoint is reached at which the sustained release spheroids, granules, or matrix multiparticulates provide a stable dissolution. The curing endpoint may be determined by comparing the dissolution profile (curve) of the dosage form immediately after curing to the dissolution profile (curve) of the dosage form after exposure to accelerated storage conditions of, e.g., at least one month at a temperature of 40° C. and a relative humidity of 75%. Cured formulations are, described in detail in'U.S. Pat. Nos. 5,273,760; 5,286,493; 5,500,227; 5,580,578; 5,639,476; 5,681,585; and 6,024,982. Other examples of sustained-release formulations and coatings which may be used in accordance with the present invention include U.S. Pat. Nos. 5,324,351; 5,356,467; and 5,472,712.
  • [0093]
    In addition to the above ingredients, the spheroids, granules, or matrix multiparticulates may also contain suitable quantities of other materials, e.g., diluents, lubricants, binders, granulating aids, colorants, flavorants and glidants that are conventional in the pharmaceutical art in amounts up to about 50% by weight of the formulation if desired. The quantities of these additional materials will be sufficient to provide the desired effect to the desired formulation.
  • [0094]
    Specific examples of pharmaceutically acceptable carriers and excipients that may be used to formulate oral dosage forms are described in the Handbook of Pharmaceutical Excipients, American Pharmaceutical Association (1986), incorporated by reference herein.
  • [0095]
    It has further been found that the addition of a small amount of talc to the sustained release coating reduces the tendency of the aqueous dispersion to stick during processing, and acts as a polishing'agent.
  • Sustained Release Osmotic Dosage
  • [0096]
    Sustained release dosage forms according to the present invention may also be prepared as osmotic dosage formulations. The osmotic dosage forms preferably include a bilayer core comprising a drug layer and a delivery or push layer, wherein the bilayer core is surrounded by a semipermeable wall and optionally having at least one passageway disposed therein.
  • [0097]
    The expression “passageway” as used for the purpose of this invention, includes aperture, orifice, bore, pore, porous element through which oxycodone or oxycodone salt can be pumped, diffuse or migrate through a fiber, capillary tube, porous overlay, porous insert, microporous member, or porous composition. The passageway can also include a compound that erodes or is leached from the wall in the fluid environment of use to produce at least one passageway. Representative compounds for forming a passageway include erodible poly(glycolic) acid, or polylactic) acid in the wall; a gelatinous filament; a water-removable polyvinyl alcohol); leachable compounds such as fluid-removable pore-forming polysaccharides, acids, salts or oxides. A passageway can be formed by leaching a compound from the wall, such as sorbitol, sucrose, lactose, maltose, or fructose, to form a sustained-release dimensional pore-passageway. The passageway can have any shape, such as round, triangular, square and elliptical, for assisting in the sustained metered release of oxycodone or oxycodone salt from the dosage form. The dosage form can be manufactured with one or more passageways in spaced-apart relation on one or more surfaces of the dosage form. A passageway and equipment for forming a passageway are disclosed in U.S. Pat. Nos. 3,845,770; 3,916,899; 4,063,064 and 4,088,864. Passageways comprising sustained-release dimensions sized, shaped and adapted as a releasing-pore formed by aqueous leaching to provide a releasing-pore of a sustained-release rata are disclosed in U.S. Pat. Nos. 4,200,098 and 4,285,987.
  • [0098]
    In pertain embodiments, the bilayer core comprises a drug layer with oxycodone or a salt thereof and a displacement or push layer. In certain embodiments the drug layer may also comprise at least one polymer hydrogel. The polymer hydrogel may have an average molecular weight of between about 500 and about 6,000,000. Examples of polymer hydrogels include but are not limited to a maltodextrin polymer comprising the formula (C6 H12 O5)n.H2O, wherein n is 3 to 7,500, and the maltodextrin polymer comprises a 500 to 1,250,000 number-average molecular weight; a poly(alkylene oxide) represented by, e.g., a poly(ethylene oxide) and a poly(propylens oxide) having a 50,000 to 750,000 weight-average molecular weight, and more specifically represented by a poly(ethylene oxide) of at least one of 100,000, 200,000, 300,000 or 400,000 weight-average molecular weights; an alkali carboxyalkylcellulose, wherein the alkali is sodium or potassium, the alkyl is methyl, ethyl, propyl, or butyl of 10,000 to 175,000 weight-average molecular weight; and a copolymer of ethylene-acrylic acid, including methacrylic and ethacrylic acid of 10,000 to 500,000 number-average molecular weight.
  • [0099]
    In certain embodiments of the present invention, the delivery or push layer comprises an osmopolymer. Examples of an osmopolymer include but are not limited to a member selected from the group consisting of a polyalkylene oxide and a carboxyalkylcellulose. The polyalkene oxide possesses a 1,000,000 to 10,000,000 weight-average molecular weight. The polyalkylene oxide may be a member selected from the group consisting of polymethylene oxide, polyethylene oxide, polypropylene oxide, polyethylene oxide having a 1,000,000 average molecular weight, polyethylene oxide comprising a 5,000,000 average molecular weight, polyethylene oxide comprising a 7,000,000 average molecular weight, cross-linked polymethylene oxide possessing a 1,000,000 average molecular weight, and polypropylene oxide of 1,200,000 average molecular weight. Typical osmopolymer carboxyalkylcellulose comprises a member selected from the group consisting of alkali carboxyalkylcellulose, sodium carboxymethylcellulose, potassium carboxymethylcellulose, sodium carboxyethylcellulose, lithium carboxymethylcellulose, sodium carboxyethylcellulose, carboxyalkylhydroxyalkylcellulose, carboxymethylhydroxyethyl cellulose, carboxyethylhydroxyethylcellulose and carboxymethylhydroxypropylcellulose. The osmopolymers used for the displacement layer exhibit an osmotic pressure gradient across the semipermeable wall. The osmopolymers imbibe fluid into dosage form, thereby swelling and expanding as an osmotic hydrogel (also known as osmogel), whereby they push the oxycodone or pharmaceutically acceptable salt thereof from the osmotic dosage form.
  • [0100]
    The push layer may also include one or more osmotically effective compounds also known as osmagents and as osmotically effective solutes. They imbibe an environmental fluid, for example, from the gastrointestinal tract, into dosage form and contribute to the delivery kinetics of the displacement layer. Examples of osmotically-active compounds comprise a member selected from the group consisting of osmotic salts and osmotic carbohydrates. Examples of specific osmagents include but are not limited to sodium chloride, potassium chloride, magnesium sulfate, lithium phosphate, lithium chloride, sodium phosphate, potassium sulfate, sodium sulfate, potassium phosphate, glucose, fructose and maltose.
  • [0101]
    The push layer may optionally include a hydroxypropylalkylcellulose possessing a 9,000 to 450,000 number-average molecular weight. The hydroxypropylalkylcellulose is represented by a member selected from the group consisting of hydroxypropyl-methylcellulose, hydroxypropylethylcellulose, hydroxypropylisopropylcellulose, hydroxypropylbutylcellulose, and hydroxypropylpentylcellulose.
  • [0102]
    The push layer optionally may comprise a nontoxic colorant or dye. Examples of colorants or dyes include but are not limited to Food and Drug Administration Colorant (FD&C), such as FD&C No. 1 blue dye, PD&C No. 4 red dye, red ferric oxide, yellow ferric oxide, titanium dioxide, carbon black, and indigo.
  • [0103]
    The push layer may also optionally comprise an antioxidant to inhibit the oxidation of ingredients. Some examples of antioxidants include but are not limited to a member selected from the group consisting of ascorbic acid, ascorbyl palmitate, butylated hydroxyanisole, a mixture of 2 and 3 tertiary-butyl-4-hydroxyanisole, butylated hydroxytoluene, sodium isoascorbate, dihydroguaretic acid, potassium sorbate, sodium bisulfate, sodium metabisulfate, sorbic acid, potassium ascorbate, vitamin E, 4-chloro-2,6-ditertiary butylpbenol, alphatocopheroi, and propylgallate.
  • [0104]
    In certain alternative embodiments, the dosage form comprises a homogenous core comprising oxycodone or a pharmaceutically acceptable salt thereof, a pharmaceutically acceptable polymer (e.g., polyethylene oxide), optionally a disintegrant (e.g., polyvinylpyrrolidone), optionally an absorption enhancer (e.g., a fatty acid, a surfactant, a chelating agent, a bile salt, etc.). The homogenous core is surrounded by semipermeable wall having a passageway (as defined above) for the release of the oxycodone or pharmaceutically acceptable salt thereof.
  • [0105]
    In certain embodiments, the semipermeable wall comprises a member selected from the group consisting of a cellulose ester polymer, a cellulose ether polymer and a cellulose ester-ether polymer. Representative wall polymers comprise a member selected from the group consisting of cellulose acylate, cellulose diacylate, cellulose triacylate, cellulose acetate, cellulose diacetate, cellulose triacetate, mono-, di- and tricellulose alkinylates, and mono-, di- and tricellulose alkinylates. The poly(cellulose) used for the present invention comprises a number-average molecular weight of 20,000 to 7,500,000.
  • [0106]
    Additional semipermeable polymers for the purpose of this invention comprise acetaldehyde dimethycellulose acetate, cellulose acetate ethylcarbamate, cellulose acetate methylcarbamate, cellulose diacetate, propylcarbamate, cellulose acetate diethylaminoacetate; semipermeable polyamide; semipermeable polyurethane; semipermeable sulfonated polystyrene; semipermeable cross-linked polymer formed by the coprecipitation of a polyanion and a polycation as disclosed in U.S. Pat. Nos. 3,173,876; 3,276,586; 3,541,005; 3,541,006 and 3,546,876; semipermeable polymers as disclosed by Loeb and Sourirajan in U.S. Pat. No. 3,133,132; semipermeable crosslinked polystyrenes; semipermeable cross-linked poly(sodium styrene sulfonate); semipermeable crosslinked poly(vinylbenzyltrimethyl ammonium chloride); and semipermeable polymers possessing a fluid permeability of 2.5×10−8 to 2.5×10−2 (cm2/hr·atm) expressed per atmosphere of hydrostatic or osmotic pressure difference across the semipermeable wall. Other polymers useful in the present invention are known in the art in U.S. Pat. Nos. 3,845,770; 3,916,899 and 4,160,020; and in Handbook of Common Polymers, Scott, J. R. and VT, J. Roff, 1971, CRC Press, Cleveland, Ohio.
  • [0107]
    In certain embodiments, preferably the semipermeable wall is nontoxic, inert, and it maintains its physical and chemical integrity during the dispensing life of the drug. In certain embodiments, the dosage form comprises a binder. An example of a binder includes, but is not limited to a therapeutically acceptable vinyl polymer having a 5,000 to 350,000 viscosity-average molecular weight, represented by a member selected from the group consisting of poly-n-vinylamide, poly-n-vinylacetamide, polyvinyl pyrrolidone), also known as poly-n-vinylpyrrolidone, poly-n-vinylcaprolactone, poly-n-vinyl-5-methyl-2-pyrrolidone, and poly-n-vinylpyrrolidone copolymers with a member selected from the group consisting of vinyl acetate, vinyl alcohol, vinyl chloride, vinyl fluoride, vinyl butyrate, vinyl laureate, and vinyl stearate. Other binders include for example, acacia, starch, gelatin, and hydroxypropylalkylcellulose of 9,200 to 250,000 average molecular weight.
  • [0108]
    In certain embodiments, the dosage form comprises a lubricant, which may be used during the manufacture of the dosage form to prevent sticking to die wall or punch faces. Examples of lubricants include but are not limited to magnesium stearate, sodium stearate, stearic acid, calcium stearate, magnesium oleate, oleic acid, potassium falcate, caprylic acid, sodium stearyl fumarate, and magnesium palmitate.
  • [0109]
    In certain preferred embodiments, the present invention includes a therapeutic composition comprising 1 to 640 mg of the oxycodone or pharmaceutically acceptable salt thereof, 25 to 500 mg of poly(alkylene oxide) having a 150,000 to 500,000 average molecular weight, 1 to 50 mg of poly(vinylpyrrolidene) having a 40,000 average molecular weight, and 0 to about 7.5 mg of a lubricant.
  • [0110]
    In certain embodiments, the invention also provides a method for administering 1 to 640 mg of oxycodone or a pharmaceutically acceptable salt thereof by admitting orally 1 to 640 mg of oxycodone or pharmaceutically acceptable salt thereof to a patient administered from a dosage form comprising a semipermeable wall permeable to aqueous-biological fluid and impervious to the passageway of oxycodone or pharmaceutically acceptable salt thereof, which semipermeable wall surrounds an internal space comprising an oxycodone drug composition and a push composition, said oxycodone drug composition comprising 1 to 640 rag of oxycodone or pharmaceutically acceptable salt thereof; 25 to 500 mg of a poly(alkylene oxide) having a 150,000 to 500,000 average molecular weight, 1 to 50 mg of a polyvinylpyrrolidone) having a 40,000 average molecular weight, and 0 to 7.5 mg of a lubricant, said push composition comprising 15 to 250 mg of a poly(alkylene oxide) of 3,090,000 to 7,500,000 average molecular weight, 0 to 75 mg of an osmagent, 1 to 50 mg of a hydroxyalkylcellulose, 0 to 10 mg of ferric oxide, 0 to 10 mg of a lubricant, and 0 to 10 mg of antioxidant and a passageway in the semipermeable wall for delivering the oxycodone or pharmaceutically acceptable salt thereof from the dosage form, by imbibing fluid through the semipermeable wall into the dosage form causing the oxycodone or oxycodone salt composition to become dispensable and the push composition to expand and push the oxycodone or oxycodone salt composition through the passageway, whereby through the combined operations of the dosage form, the oxycodone or oxycodone salt is delivered at a therapeutically effective dose at a rate controlled over a sustained period of time.
  • [0111]
    The dosage forms of the present invention may optionally be coated with one or more coatings suitable for the regulation of release or for the protection of the formulation. In one embodiment, coatings are provided to permit either pH-dependent or pH-independent release, e.g., when exposed to gastrointestinal (GI) fluid. When a pH-independent coating is desired, the coating is designed to achieve optimal release regardless of pH-changes in the environmental fluid, e.g., the GI tract. Other preferred embodiments include a pH-dependent coating that releases the oxycodone or pharmaceutically acceptable salt thereof in desired areas of the GI tract, e.g., the stomach or small intestine, such that an absorption profile is provided which is capable of providing at least about twelve hours and preferably about twenty-four hours or more of analgesia to a patient. It is also possible to formulate compositions which release a portion of the dose in one desired area of the GI tract, e.g., the stomach, and release the remainder of the dose in another area of the GI tract, e.g., the small intestine.
  • [0112]
    Formulations according to the invention that utilize pH-dependent coatings may also impart a repeat-action effect whereby unprotected drug is coated over an enteric coat and is released, in the stomach, while the remainder, being protected by the enteric coating, is released further down the gastrointestinal-tract. Coatings which are pH-dependent and may be used in accordance with the present invention include a sustained release material such as, e.g., shellac, cellulose acetate phthalate (CAP), polyvinyl acetate phthalate (PVAP), hydroxypropyl methylcellulose phthalate, and methacrylic acid ester copolymers, zein, and the like.
  • [0113]
    In certain embodiments of the present invention, an effective amount of oxycodone or pharmaceutically acceptable salt thereof in immediate release form is included in the formulation. The immediate release form of the oxycodone or oxycodone salt is included in an amount which is effective to reduce the time to maximum concentration of the oxycodone in the blood (e.g., plasma), such that the Tmax is reduced. By including such an effective amount of immediate release oxycodone or oxycodone salt in the unit dose, the experience of relatively higher levels of pain in patients may be reduced. In such embodiments, an effective amount of the oxycodone or oxycodone salt in immediate release form may be coated onto the tablet of the present invention. For example, where the extended release oxycodone or oxycodone salt from the formulation is due to a sustained release coating, the immediate release layer would be overcoated on top of the sustained release coating. On the other hand, the immediate release layer may be coated onto the surface of tablets wherein the oxycodone or oxycodone salt is incorporated in a sustained release matrix. One skilled in the art would recognize still other alternative manners of incorporating the immediate release oxycodone or oxycodone salt portion into the formulation. Such alternatives are deemed to be encompassed by the appended claims.
  • [0114]
    In yet further embodiments, the sustained release dosage forms of the present invention in addition to oxycodone or oxycodone salt may further include a non-opioid drug which may or may not act synergistically with the oxycodone or oxycodone salt. Such non-opioid drugs would preferably provide additional analgesia, and include, for example, aspirin; acetaminophen; non-steroidal anti-inflammatory drugs (“NSAIDS”), e.g., ibuprofen, ketoprofen, etc.; N-methyl-D-aspartate (NMDA) receptor antagonists, e.g., a morphinan such as dextromethorphan or dextrorphan, or ketamine; cyclooxygenase-II inhibitors (“COX-II inhibitors”); and/or glycine receptor antagonists.
  • [0115]
    In certain embodiments of the present invention, the invention allows for the use of lower doses of oxycodone or oxycodone salt by virtue of the inclusion of an additional non-opioid analgesic, such as an NSAID or a COX-2 inhibitor. By using lower amounts of either or both drugs, the side effects associated with effective pain management in humans may be reduced.
  • [0116]
    Suitable non-steroidal anti-inflammatory agents, include ibuprofen, diclofenac, naproxen, benoxaprofen, flurbiprofen, fenoprofen, flubufen, ketoprofen, indoprofen, piroprofen, carprofen, oxaprozin, pramoprofen, muroprofen, trioxaprofen, suprofen, aminoprofen, tiaprofenic acid, fluprofen, bucloxic acid, indomethacin, sulindac, tolmetin, zomepirac, tiopinac, zidornetacin, acemetacin, fentiazac, clidanac, oxpinae, mefenamic acid, meclofenamic acid, flufenamic acid, niflumic acid, tolfunamie acid, diflurisal, flufenisal, piroxicam, sudoxicam, isoxicam, pharmaceutically acceptable salts thereof, mixtures thereof, and the like. Useful dosages of these drugs are well known to those stalled in the art.
  • [0117]
    N-methyl-D-aspartate (NMDA) receptor antagonists are well known in the art, and encompass, for example, morphinans such as dextromethorphan or dextrorphan, ketamine, or pharmaceutically acceptable salts thereof. For purposes of the present invention, the term “NMDA antagonist” is also deemed to encompass drugs that at least partially inhibit a major intracellular consequence of NMDA-receptor activation, e.g. a ganglioside such as GM1 or GT1b, a phenothiazine such as trifluoperazine or a naphthalenesulfonamide such as N-(6-aminothexyl)-5-chloro-1-naphthalenesulfonamide. These drugs are stated to inhibit the development of tolerance to and/or dependence on addictive drugs, e.g., narcotic analgesics such as morphine, codeine, etc. in U.S. Pat. Nos. 5,321,012 and 5,556,838 (both to Mayer, at al.), and to treat chronic pain in U.S. Pat. No. 5,502,058 (Mayer, at al.). The NMDA antagonist may be included alone, or in combination with a local anesthetic such as lidocaine, as described in these Mayer, et al. patents.
  • [0118]
    The treatment of chronic pain via the use of glycine receptor antagonists and the identification of such drugs is described in U.S. Pat. No. 5,514,680 (Weber, et al.).
  • [0119]
    COX-2 inhibitors have been reported in the art and many chemical structures are known to produce inhibition of cyclooxygenase-2. COX-2 inhibitors are described, for example, in U.S. Pat. Nos. 5,616,601; 5,604,260; 5,593,994; 5,550,142; 5,536,752; 5,521,213; 5,475,995; 5,639,780; 5,604,253; 5,552,422; 5,510,368; 5,436,265; 5,409,944; and 5,130,311. Certain preferred COX-2 inhibitors include celecoxib (SC-58635), DUP-697, flosulide (COP-28238), meloxicam, 6-methoxy-2 naphthylacetic acid (6-MNA), MK-966 (also known as Vioxx), nabumetone (prodrug for 6-MNA), nimesulide, NS-398, SC-5766, SC-58215, T-614; or combinations thereof. Dosage levels of COX-2 inhibitor on the order of from about 0.005 mg to about 140 mg per kilogram of body weight per day are therapeutically effective in combination with oxycodone or oxycodone salt. Alternatively, about 0.25 mg to about 7 g per patient per day of a COX-2 inhibitor is administered in combination with oxycodone or oxycodone salt.
  • [0120]
    In yet further embodiments, a non-opioid drug can be included which provides a desired effect other than analgesia, e.g., antitussive, expectorant, decongestant, antihistamine drugs, local anesthetics, and the like.
  • [0121]
    The additional (non-opioid) therapeutically active agent may be included in sustained release form or in immediate release form. The additional drug may be incorporated into the sustained release matrix along with the oxycodone or oxycodone salt, may be incorporated as a powder, granulation, etc. into the dosage form, or may be incorporated as a separated sustained release layer or immediate release layer.
  • [0122]
    The sustained-release oral solid dosage forms of the present invention may be opioid-sparing. It is possible that the sustained-release oral solid dosage forms of the present invention may be dosed at a substantially lower daily dosage in comparison to conventional immediate-release products, with no significant difference in analgesic efficacy. At comparable daily dosages, greater efficacy may result with the use of sustained-release oral solid dosage forms of the present invention in comparison to conventional immediate-release products.
  • [0123]
    The present invention will now be more fully described with reference to the accompanying examples. It should be understood, however, that the following description is illustrative only and should not be taken in any way as a restriction on the generality of the invention specified above.
  • EXAMPLE 1
  • [0124]
    Oxycodone sustained release matrix tablets are produced with the formula set forth in Table 1 below:
  • [0000]
    TABLE 1
    Amt/unit Amt/batch
    Ingredient (mg) (gram)
    Oxycodone HCl 30.0 150.0
    Spray Dried Lactose 50.0 250.0
    Povidone 8.0 40.0
    Eudragit RS30D (Solids) 50.0 250.0
    Triacetin 6.0 30.0
    Stearyl Alcohol 70.0 350.0
    Talc 4.0 20.0
    Magnesium Stearate 2.0 10.0
    Opadry Red YS1-15597-A 10.0 50.0
    Purified Water * *
    Total 230.0 1150.0
    *Used for processing and remains in product as residual moisture only.
  • [0125]
    According to the following procedure:
      • 1. Granulation: Spray the Eudragit/Triacetin dispersion onto the Oxycodone HCl, Spray Dried Lactose and Povidone using a fluid bed granulator.
      • 2. Milling: Discharge the granulation and pass through a mill with approximately 1 mm openings (18 mesh screen),
      • 3. Waxing: Melt the stearyl alcohol at about 50 degrees C. and add to the milled granulation using a high shear mixer. Allow to cool to room temperature on trays or a fluid bed.
      • 4. Milling: Pass the cooled granulation through a mill with an approximately 18 mesh screen.
      • 5. Lubrication: Lubricate the granulation with talc and magnesium stearate using a mixer.
      • 6. Compression: Compress the granulation into tablets using a Kilian® Tablet press.
      • 7. Film Coating: Apply an aqueous film coat to the tablets using a rotary pan.
    EXAMPLE 2
  • [0133]
    Oxycodone sustained release osmotic tablets are produced with the formula set forth in Table 2 below:
  • [0000]
    TABLE 2
    Amt/unit
    Ingredient (mg)
    Drug Layer:
    Oxycodone HCl 35.20
    Polyethylene oxide 130.24
    Povidone 8.8
    Magnesium Stearate 1.76
    Displacement Layer:
    Polyethylene oxide 85.96
    Sodium chloride 40.50
    Hydroxypropylmethylcellulose 6.75
    Ferric Oxide 1.35
    Magnesium Stearate 0.34
    BHT 0.10
    Semipermeable Wall:
    Cellulose acetate 38.6
  • [0134]
    The dosage form having the above formulation is prepared according to the following procedure:
  • [0135]
    First, 175 g of oxycodone hydrochloride, 647.5 g of poly(ethylene oxide) possessing a 200,000 average molecular weight, and 43.75 g of poly(vinylpyrrolidone) having a 40,000 average molecular weight is added to a mixer and mixed for 10 minutes. Then, 331 g of denatured anhydrous alcohol is added to the blended materials with continuous mixing for 10 minutes. Then, the wet granulation is passed through a 20 mesh screen, allowed to dry at room temperature for 20 hours, and then passed through a 16 mesh screen. Next, the granulation is transferred to the mixer, mixed and lubricated with 8.75 g of magnesium stearate.
  • [0136]
    Then, the displacement or push composition for pushing the oxycodone HCl composition from the dosage form is prepared as follows: first 3910 g of hydroxypropylmethylcellulose possessing an 11,200 average molecular weight is dissolved in 45,339 g of water. Then, 101 g of butylated hydroxytoluene is dissolved in 650 g of denatured anhydrous alcohol. Next, 2.5 kg of the hydroxypropylmethylcellulose aqueous solution is added with continuous mixing to the butylated hydroxytoluene alcohol solution. Then, binder solution preparation is completed by adding with continuous mixing the remaining hydroxypropylmethylcellulose aqueous solution to the butylated hydroxytoluene alcohol solution.
  • [0137]
    Next, 36,000 g of sodium chloride is sized using a Quadro Comil® mill equipped with a 21 mesh screen. Then, 1200 g of ferric oxide is passed through a 40 mesh screen. Then, the screened materials, 76,400 g of pharmaceutically acceptable polyethylene oxide) possessing a 7,500,000 average molecular weight, 2500 g of hydroxypropylmethylcellulose having a 11,200 average molecular weight are added to a Glatt® Fluid Bed Granulation's bowl. The bowl is attached to the granulator and the granulation process is initiated for effecting granulation. Next, the dry powders are air suspended and mixed for 10 minutes. Then, the binder solution is sprayed from 3 nozzles onto the powder. The granulating is monitored during the process as follows: total solution spray rate of 800 g/min; inlet temperature 43° C. and air flow 4300 m3/hr. At the end of solution spraying, 45,033 g, the resultant coated granulated particles are subjected to a drying process for 35 minutes.
  • [0138]
    The coated granules are sized using a Quadro Comil® mill with an 8 mesh screen. The granulation is transferred to a Tote® Tumbler, mixed and lubricated with 281.7 g of magnesium stearate.
  • [0139]
    Next, the drug composition comprising the oxycodone hydrochloride and the push composition are compressed into bilayer tablets on a Kilian® Tablet press. First, 176 mg of the oxycodone hydrochloride composition is added to the die cavity and precompressed, then, 135 mg of the push composition is added and the layers are pressed under a pressure head of 3 metric tons into an 11/32 inch (0.873 cm) diameter contacting layer arrangement.
  • [0140]
    The bilayered arrangements are coated with a semipermeable wall. The wall forming composition comprises 100% cellulose acetate having a 39.8% acetyl content. The wall-forming composition is dissolved in acetone:water (95:5 wt:wt) cosolvent to make a 4% solid solution. The wall-forming composition is sprayed onto and around the bilayers in a 24 inch (60 cm) Vector® Hi-Coater. Next, one 20 mil (0.508 mm) exit passageway is drilled through the semipermeable wall to connect the drug oxycodone layer with the exterior of the dosage form. The residual solvent is removed by drying for 72 hours at 45° C. and 45% humidity. Next, the osmotic dosage systems are dried for 4 hours at 45° C. to remove excess moisture. The dosage forms produced by this manufacture comprises 35.20 mg of oxycodone HCl, 139.24 mg of poly(ethylene oxide) of 200,000 average molecular weight, 8.80 mg of poly(vinylpyrrolidone) of 40,000 average molecular weight, and 1.76 mg of magnesium stearate. The push composition comprises 85.96 mg of poly(ethylene oxide) of 7,500,000 average molecular weight, 40.50 mg of sodium chloride, 6.75 mg of hydroxypropylmethylcellulose, 1.35 mg of red ferric oxide, 0.34 mg of magnesium stearate, and 0.10 mg of butylated hydroxytoluene. The semipermeable wall comprises 38.6 mg of cellulose acetate comprising a 39.8% acetyl content. The dosage form comprises one passageway, 20 mil (0.508 mm).
  • EXAMPLE 3
  • [0141]
    Oxycodone sustained release osmotic tablets are produced with the formula set forth in Table 3 below:
  • [0000]
    TABLE 3
    Ingredient Percentage
    Drug Layer: Percentage of Drug Layer
    Oxycodone HCL 28.8
    Polyethylene oxide 64.2
    Povidone 6
    Magnesium Stearate 1
    Percentage of Displacement
    Displacement Layer: Layer
    Polyethylene oxide 63.675
    Sodium chloride 30
    Hydroxypropylmethylcellulose 5
    Ferric Oxide 1
    Magnesium Stearate 0.25
    BHT 0.075
    Percentage of
    Semipermeable Wall: Semipermeable Wall
    Cellulose acetate 95
    Polyethylene glycol 5
  • [0142]
    The dosage form having the above formulation is prepared according to the following procedure:
  • [0143]
    First, 1728 g of oxycodone HCl, 3852 g of polyethylene oxide) possessing a 200,000 average molecular weight, and 360 g of poly(vinyl pyrrolidone) having an average molecular weight of 40,000 are added to a planetary mixing bowl. Next, the dry materials are mixed for ten minutes. Then, 1616 g of denatured anhydrous ethyl alcohol is slowly added to the blended materials with continuous mixing for 15 minutes. Next, the freshly prepared wet granulation is passed through a 20 mesh screen, allowed to dry at room temperature for 20.5 hours, and passed through a 16 mesh screen. Next, the granulation is transferred to a planetary mixer, mixed and lubricated with 59.8 g of magnesium stearate.
  • [0144]
    Next, a push composition is prepared as follows: first, a binder solution is prepared by dissolving 3910 g of hydroxypropylmethylcellulose possessing an average molecular weight of 11,200 in 45,339 g of water. Next, 101 g of butylated hydroxytoluene is dissolved in 650 g of denatured anhydrous alcohol. Approximately 2.5 kg of the hydroxypropyl-methylcellulose/water solution is added to the butylated hydroxytoluene/alcohol solution with continuous mixing. Next, the binder solution preparation is completed by adding the remaining hydroxypropyl-methylcellulose/water solution to the butylated hydroxyl-toluene/alcohol solution, again with continuous mixing.
  • [0145]
    Next, 36,000 g of sodium chloride is sized using a Quadro Comil® mill, used to reduce the particle size of the sodium chloride. A fluid air mill is another mill used to size materials with a 21 mesh screen. Next, 1200 g of ferric oxide is passed through a 40 mesh screen. Then, all the screened materials, 76,400 g of pharmaceutically acceptable poly(ethylene oxide) comprising a 7,000,000 average molecular weight, 2520 g of hydroxypropylmethylcellulose comprising an average molecular weight of 11,200 is added to a Glatt Fluid Bed Granulator bowl. The bowl is attached to the granulator and the granulation process is initiated for effecting granulation. Next, the dry powders are air suspended and mixed for 10 minutes. Then, the binder solution is, sprayed from 3 nozzles onto the powder.
  • [0146]
    While spraying the binder solution, the filter bags are shaken for 10 seconds every 1.5 minutes to unglue any possible powder deposits. At the end of the solution spraying, 45,033 g of the resultant coated granulated particles are subjected to a drying process for 35 minutes. The machine is turned off, and the coated granules are removed from the granulator. The coated granules are sized using a Quadro Comil with an 8 mesh screen. The granulation is transferred to Tote Tumbler, mixed and lubricated with 281.7 g of magnesium stearate. Please review second sentence and clarify.
  • [0147]
    Next, the oxycodone HCl drag composition and the push composition are compressed into bilayer tablets on the Kilian® Tablet Press. First, 434 mg of the oxycodone HCl composition is added to the die cavity and pre-compressed, then, 260 mg of the push composition is added and the layers are pressed under a pressure head of approximately 3 metric tons into a 0.700″ (1.78 cm)×0.375″ (0.95 cm) oval contacting layered arrangement.
  • [0148]
    The bilayered arrangement is coated with a semi-permeable wall. The wall forming composition comprises 95% cellulose acetate having a 39.8% acetyl content, and 5% polyethylene glycol having a molecular weight of 3350. The wall-forming composition is dissolved in an acetone:water (95:5 wt:wt) cosolvent to make a 4% solids solution. The wall-forming composition is sprayed onto and around the bilayers in a 24″ Vector Hi® Coater.
  • [0149]
    Next, two 30 mil (0.762 mm) exit passageways are drilled through the semi-permeable wall to connect the drug layer with the exterior of the dosage system. The residual solvent is removed by drying for 48 hours at 50° C. and 50% humidity. Next, the osmotic dosage forms are dried for 4 hours at 50° C. to remove excess moisture. The dosage form produced by this manufacture provides 28.8% oxycodone HCl, 64.2% poly(ethylene oxide) possessing a 200,000 average molecular weight, 6% poly(vinyl pyrrolidone) possessing a 40,000 average molecular weight, and 1% magnesium stearate. The push composition comprises 63.675% polyethylene oxide) comprising a 7,000,000 average molecular weight, 30% sodium chloride, 5% hydroxypropylmethylcellulose comprising a 11,200 average molecular weight, 1% ferric oxide, 0.075% butylated hydroxytoluene, and 0.25% magnesium stearate. The semipermeable wall comprises 95 wt % cellulose acetate comprising a 39.8% acetyl content, and 5.0 wt % polyethylene glycol comprising a 3350 average molecular weight. The dosage form comprises two passageways, 30 mils (0.762 mm), and has an oxycodone hydrochloride mean release rate of about 5 mg/hr.
  • [0150]
    The dosage form in further embodiments can comprise 65 wt % to 100 wt % of a cellulose polymer which polymer comprises a member selected from the group consisting of a cellulose ester, cellulose diester, cellulose triester, cellulose ether, cellulose ester-ether, cellulose acylate, cellulose diacylate, cellulose triacetate, cellulose acetate butyrate, and the like. The wall can also comprise from 0 wt % to 40 wt % of a cellulose ether member selected from the group consisting of hydroxypropylcellulose and hydroxypropylmethylcellulose and from 0 wt % to 20 wt % of polyethylene glycol. The total amount of all components comprising the wall is equal to 100 wt %. Semipermeable polymers useful for manufacturing wall of the dosage form are disclosed in U.S. Pat. Nos. 3,845,770; 3,916,899; 4,008,719; 4,036,228; and 4,111,201.
  • [0151]
    The wall in other preferred processes comprises the selectively permeable cellulose ether, ethyl cellulose. The ethyl cellulose comprises an ethoxy group with a degree of substitution, of about 1.4 to 3, equivalent to 40% to 50% ethoxy content, and a viscosity range of 7 to 100 centipoise, or higher. More specifically, the wall comprises 45 wt % to 80 wt % ethyl cellulose, from 5 wt % to 30 wt % hydroxypropylcellulose, and from 5 wt % to 30 wt % polyethylene glycol, with the total weight percent of all components comprising the wall equal to 100 wt %. In another embodiment the wall comprises 45 wt % to 80 wt % of ethylcellulose, from 5 wt % to 30 wt % hydroxypropylcellulose, from 2 wt % to 20 wt % of polyvinyl pyrrolidone, with the total amount of all components comprising the wall equal to 100 wt %.
  • EXAMPLE 4
  • [0152]
    Oxycodone 10 mg sustained release capsules were prepared with the formula set forth in Table 4 below:
  • [0000]
    TABLE 4
    Amt/unit
    Ingredient: (mg)
    Oxycodone HCl 10.0
    Stearic Acid 8.25
    Stearic Alcohol 24.75
    Eudragit RSPO 77
    Total 120

    The formulation above was prepared according to the following procedure:
      • 1. Pass the stearyl alcohol flakes through an impact mill.
      • 2. Blend the Oxycodone HCl, stearic acid, stearyl alcohol and the Eudragit RSPO in a suitable blender/mixer.
      • 3. Continuously feed the blended material into a twin screw extruder at elevated temperatures, and collect the resultant strands on a conveyor.
      • 4. Allow the strands to cool on the conveyor.
      • 5. Cut the strands into 1 mm pellets using a pelletizer.
      • 6. Screen the pellets for fines and oversized pellets to an acceptable range of about 0.8-1.4 mm in size.
      • 7. Fill into capsules with a fill weight of 120 mg/capsule (fill into size 2 capsules).
  • [0160]
    The pellets were then tested for dissolution using the following procedure: Fiber optic UV dissolution using USP apparatus 1 (basket) at 100 fpm in 900 ml simulated gastric fluid (SGP) and in 900 ml simulated intestinal fluid (SIF) monitoring at 282 nm.
  • [0161]
    The dissolution parameters are set forth in Table 4A below:
  • [0000]
    TABLE 4A
    Time % Dissolved in % Dissolved in
    (hour) SGF SIF
    1 15 10
    2 22 15
    4 32 22
    8 44 29
    12 53 34
    18 62 40
    24 66 44
  • EXAMPLE 5
  • [0162]
    Oxycodone 160 mg sustained release capsules were prepared with the formula set forth in Table 5 below:
  • [0000]
    TABLE 5
    Amt/unit
    Ingredient (mg)
    Oxycodone HCL 160
    Stearic Acid 80
    Stearyl Alcohol 20
    Eudragit RSPO 140
    Total 400
  • [0163]
    The formulation above was prepared according to the following procedure;
    • 1. Pass the stearyl alcohol flakes through an impact mill.
    • 2. Blend the Oxycodone HCl, stearic acid, stearyl alcohol and the Eudragit RSPO in a suitable lender/mixer.
    • 3. Continuously feed the blended material into a twin screw extruder at elevated temperatures and collect the resultant strands on a conveyor.
    • 4. Allow the strands to cool on the conveyor.
    • 5. Cut the strands into 1 mm pellets using a pellelizer.
    • 6. Screen the pellets for fines and oversized pellets to an acceptable range of about 0.8-1.4 mm in size.
    • 7. Fill into capsules with a fill weight of 400 mg/capsule (Fill into size 00 capsules).
    Dissolution Method:
  • [0171]
    The pellets were then tested for dissolution using the following procedure:
      • Fiber optic UV dissolution using USP apparatus 1 (basket) at 100 rpm in 900 ml simulated gastric fluid (SOF) and in 900 ml simulated intestinal fluid (SU) monitoring at 282 nm.
      • The dissolution parameters for the above formulation are set forth in Table 5A below: Please ensure Table 5A does not have error message.
  • [0000]
    TABLE 5A
    Time % Dissolved in % Dissolved in
    (hour) SGF SIF
    1 32 20
    2 47 28
    4 66 42
    8 86 60
    12 93 70
    18 95 77
    24 95 80
  • [0174]
    Many other variations of the present invention will be apparent to those skilled in the art and are meant to be within the scope of the claims appended hereto.

Claims (32)

  1. 1-22. (canceled)
  2. 23. A sustained release oral dosage form comprising:
    (a) a bilayer core comprising:
    (i) a drug layer comprising an analgesically effective amount of oxycodone or a pharmaceutically acceptable salt thereof; and
    (ii) a displacement layer comprising an osmopolymer; and
    (b) a semipermeable wall surrounding the bilayer core having a passageway disposed therein for the release of said oxycodone or pharmaceutically acceptable salt thereof;
    said dosage form providing an analgesic effect for at least about 24 hours after steady-state oral administration to human patients; and
    said dosage form providing a mean C24/Cmax oxycodone ratio of 0.6 to 1.0 after oral administration at steady state to said patients.
  3. 24. The dosage form of claim 23, which provides a mean Tmax of oxycodone in about 2 to about 17 hours after administration at steady state to said patients.
  4. 25. The dosage form of claim 23, which provides a mean Tmax of oxycodone in about 8 to about 16 hours after administration at steady state to said patients.
  5. 26. The dosage form of claim 23, which provides a mean W50 of the oxycodone of between 4 and 24 hours after administration at steady state to said patients.
  6. 27. The dosage form of claim 23, which provides a W50 of the oxycodone of at least 12 hours after administration at steady state to said patients.
  7. 28. The dosage form of claim 23, wherein said displacement layer further comprises an osmagent.
  8. 29. The dosage form of claim 28, wherein said osmagent is selected from the group consisting of osmotic salts and osmotic carbohydrates.
  9. 30. The dosage form of claim 23, wherein said pharmaceutically acceptable salt of oxycodone is oxycodone hydrochloride.
  10. 31. The dosage form of claim 23, wherein said oxycodone or pharmaceutically acceptable salt thereof is in an amount of from about 5 to about 640 mg.
  11. 32. The dosage form of claim 23, which provides a mean Tmax of oxycodone which occurs at about 12 to about 16 hours after administration at steady state to said patients.
  12. 33. The dosage form of claim 23, which provides a mean C24/Cmax ratio of 0.7 to 0.99 after administration at steady state to said patients.
  13. 34. The dosage form of claim 23, which provides a mean C24/Cmax ratio of 0.8 to 0.95 after administration at steady state to said patients.
  14. 35. The dosage form of claim 23, which provides an in-vitro release rate, of oxycodone or a pharmaceutically acceptable salt thereof, when measured by the USP Basket Method at 100 rpm in 900 ml aqueous buffer at a pH of between 1.6 and 7.2 at 37° C. of from 0% to about 40% at 1 hour, from about 8% to about 70% at 4 hours, from about 20% to about 80% at 8 hours, from about 30% to about 95% at 12 hours, from about 35% to about 95% at 18 hrs, and greater than about 50% at 24 hours.
  15. 36. A method of treating pain in patients comprising:
    orally administering to human patients a sustained release oral dosage form comprising
    (a) a bilayer core comprising:
    (i) a drug layer comprising an analgesically effective amount of oxycodone or a pharmaceutically acceptable salt thereof; and
    (ii) a displacement layer comprising an osmopolymer; and
    (b) a semipermeable wall surrounding the bilayer core having a passageway disposed therein for the release of said oxycodone or pharmaceutically acceptable salt thereof;
    to provide an analgesic effect at least about 24 hours after oral administration at steady state to human patients; and to provide a mean C24/Cmax oxycodone ratio of 0.6 to 1.0 after oral administration at steady state to said patients.
  16. 37. The method of claim 36, which provides a mean Tmax of oxycodone at about 2 to about 17 hours after administration at steady state to said patients.
  17. 38. The method of claim 36, which provides a mean Tmax of oxycodone at about 8 to about 16 hours after administration at steady state to said patients.
  18. 39. The method of claim 36, which provides a W50 of the oxycodone of between 4 and 24 hours after administration at steady state to said patients.
  19. 40. The method of claim 39, which provides a W50 of the oxycodone of at least 12 hours after administration at steady state to said patients.
  20. 41. The method of claim 36, which provides a mean C24/Cmax ratio of 0.7 to 0.99 after administration at steady state to said patients.
  21. 42. The method of claim 36, which provides a mean C24/Cmax ratio of 0.8 to 0.95 after administration at steady state to said patients.
  22. 43. The method of claim 36, wherein said dosage form provides an in-vitro release rate of oxycodone or a pharmaceutically acceptable salt thereof, when measured by the USP Basket Method at 100 rpm in 900 ml aqueous buffer at a pH of between 1.6 and 7.2 at 37° C. of from 0% to about 40% at 1 hour, from about 8% to about 70% at 4 hours, from about 20% to about 80% at 8 hours, from about 30% to about 95% at 12 hours, from about 35% to about 95% at 18 hrs, and greater than about 50% at 24 hours.
  23. 44-71. (canceled)
  24. 72. The dosage form of claim 23, which is overcoated with an additional amount of oxycodone or a pharmaceutically acceptable salt thereof in an immediate release form.
  25. 73. An osmotic dosage form comprising
    a homogeneous core comprising oxycodone or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable polymer; and
    a semipermeable membrane having a passageway, the semipermeable membrane surrounding the homogeneous core;
    wherein the dosage form provides an analgesic effect for at least about 24 hours and a mean C24/Cmax oxycodone ratio of 0.7 to 1 after steady-state oral administration to human patients.
  26. 74. The dosage form of claim 73, which is overcoated with additional oxycodone and pharmaceutically acceptable salt thereof in an immediate release form.
  27. 75. The dosage form of claim 73, wherein the pharmaceutically acceptable polymer is polyethylene oxide.
  28. 76. The dosage form of claim 73, further comprising a disintegrant.
  29. 77. The dosage form of claim 73, further comprising an absorption enhancer.
  30. 78. The dosage form of claim 73, wherein the semipermeable membrane comprises a poly(cellulose) with a number-average molecular weight of 20,000 to 7,500,000.
  31. 79. The dosage form of claim 78, wherein the poly(cellulose) is selected from the group consisting of a cellulose ester polymer, a cellulose ether polymer and cellulose ester-ether polymer.
  32. 80. An osmotic dosage form comprising:
    1 to 640 mg of oxycodone or a pharmaceutically acceptable salt thereof,
    25 to 500 mg of poly(alkylene oxide having a 150,000 to 500,000 average molecular weight,
    1 to 50 mg of polyvinylpyrrolidone) having a 40,000 average molecular weight, and
    0 to about 7.5 mg of a lubricant,
    wherein the dosage form provides an analgesic effect for at least about 24 hours and a mean C24/Cmax oxycodone ratio of 0.7 to 1 after steady-state oral administration to human patients.
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070298103A1 (en) * 2004-02-12 2007-12-27 Euro-Celtique S.A. Particulates
US20090029170A1 (en) * 2004-02-12 2009-01-29 Geoffrey Gerard Hayes Extrusion
US8808745B2 (en) 2001-09-21 2014-08-19 Egalet Ltd. Morphine polymer release system
US8877241B2 (en) 2003-03-26 2014-11-04 Egalet Ltd. Morphine controlled release system
US9005660B2 (en) 2009-02-06 2015-04-14 Egalet Ltd. Immediate release composition resistant to abuse by intake of alcohol
US9023394B2 (en) 2009-06-24 2015-05-05 Egalet Ltd. Formulations and methods for the controlled release of active drug substances
US9044402B2 (en) 2012-07-06 2015-06-02 Egalet Ltd. Abuse-deterrent pharmaceutical compositions for controlled release
US9492444B2 (en) 2013-12-17 2016-11-15 Pharmaceutical Manufacturing Research Services, Inc. Extruded extended release abuse deterrent pill
US9642809B2 (en) 2007-06-04 2017-05-09 Egalet Ltd. Controlled release pharmaceutical compositions for prolonged effect
US9694080B2 (en) 2001-09-21 2017-07-04 Egalet Ltd. Polymer release system
US9707184B2 (en) 2014-07-17 2017-07-18 Pharmaceutical Manufacturing Research Services, Inc. Immediate release abuse deterrent liquid fill dosage form
US9861629B1 (en) 2015-10-07 2018-01-09 Banner Life Sciences Llc Opioid abuse deterrent dosage forms

Citations (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738303A (en) * 1952-07-18 1956-03-13 Smith Kline French Lab Sympathomimetic preparation
US2921883A (en) * 1957-05-03 1960-01-19 Smith Kline French Lab Novel coating material for medicaments
US3082154A (en) * 1960-04-19 1963-03-19 Ici Ltd Improved free-flowing coated antimalarial salts in particulate form
US3492397A (en) * 1967-04-07 1970-01-27 Warner Lambert Pharmaceutical Sustained release dosage in the pellet form and process thereof
US3773920A (en) * 1971-07-14 1973-11-20 Nikken Chemicals Co Ltd Sustained release medicinal composition
US3922339A (en) * 1974-06-20 1975-11-25 Kv Pharm Co Sustained release medicant
US3965256A (en) * 1972-05-16 1976-06-22 Synergistics Slow release pharmaceutical compositions
US4327725A (en) * 1980-11-25 1982-05-04 Alza Corporation Osmotic device with hydrogel driving member
US4443428A (en) * 1982-06-21 1984-04-17 Euroceltique, S.A. Extended action controlled release compositions
US4455143A (en) * 1982-03-22 1984-06-19 Alza Corporation Osmotic device for dispensing two different medications
US4708874A (en) * 1985-03-13 1987-11-24 Rijksuniversiteit Groningen Devices for the controlled release of active substances, as well as process for the preparation thereof
US4722815A (en) * 1984-12-27 1988-02-02 Japan Liquid Crystal Co., Ltd. Process of making a synthetic resin product containing a molecular inclusion compound in cyclodextrin
US4828836A (en) * 1986-06-05 1989-05-09 Euroceltique S.A. Controlled release pharmaceutical composition
US4834984A (en) * 1986-06-10 1989-05-30 Euroceltique S.A. Controlled release dihydrocodeine composition
US4834985A (en) * 1986-06-05 1989-05-30 Euroceltique S.A. Controlled release pharmaceutical composition
US4844909A (en) * 1986-10-31 1989-07-04 Euroceltique, S.A. Controlled release hydromorphone composition
US4861598A (en) * 1986-07-18 1989-08-29 Euroceltique, S.A. Controlled release bases for pharmaceuticals
US4970075A (en) * 1986-07-18 1990-11-13 Euroceltique, S.A. Controlled release bases for pharmaceuticals
US5026560A (en) * 1987-01-29 1991-06-25 Takeda Chemical Industries, Ltd. Spherical granules having core and their production
US5030400A (en) * 1989-07-03 1991-07-09 A/S Niro Atomizer Process and an apparatus for agglomeration of a powdery material
US5068110A (en) * 1987-09-29 1991-11-26 Warner-Lambert Company Stabilization of enteric coated dosage form
US5071646A (en) * 1988-11-11 1991-12-10 Euroceltique, S.A. Pharmaceutical ion exchange resin composition
US5098718A (en) * 1989-06-12 1992-03-24 Rhone-Poulenc Sante Enzymatically degradable coating compositions for feed additives intended for ruminants
US5098714A (en) * 1989-11-16 1992-03-24 Alza Corporation Osmotic, oral dosage form for fertility control
US5122384A (en) * 1989-05-05 1992-06-16 Kv Pharmaceutical Company Oral once-per-day organic nitrate formulation which does not induce tolerance
US5126145A (en) * 1989-04-13 1992-06-30 Upsher Smith Laboratories Inc Controlled release tablet containing water soluble medicament
US5132142A (en) * 1991-03-19 1992-07-21 Glatt Gmbh Apparatus and method for producing pellets by layering power onto particles
US5133974A (en) * 1989-05-05 1992-07-28 Kv Pharmaceutical Company Extended release pharmaceutical formulations
US5156850A (en) * 1990-08-31 1992-10-20 Alza Corporation Dosage form for time-varying patterns of drug delivery
US5167964A (en) * 1992-02-14 1992-12-01 Warner-Lambert Company Semi-enteric drug delivery systems and methods for preparing same
US5169645A (en) * 1989-10-31 1992-12-08 Duquesne University Of The Holy Ghost Directly compressible granules having improved flow properties
US5178868A (en) * 1988-10-26 1993-01-12 Kabi Pharmacia Aktiebolaq Dosage form
US5196203A (en) * 1989-01-06 1993-03-23 F. H. Faulding & Co. Limited Theophylline dosage form
US5202128A (en) * 1989-01-06 1993-04-13 F. H. Faulding & Co. Limited Sustained release pharmaceutical composition
US5206030A (en) * 1990-02-26 1993-04-27 Fmc Corporation Film-forming composition and use for coating pharmaceuticals, foods and the like
US5215758A (en) * 1991-09-11 1993-06-01 Euroceltique, S.A. Controlled release matrix suppository for pharmaceuticals
US5219575A (en) * 1987-06-26 1993-06-15 Duphar International Research B.V. Compositions with controlled zero-order delivery rate and method of preparing these compositions
US5248516A (en) * 1989-12-19 1993-09-28 Fmc Corporation Film-forming composition: method of producing same and use for coating pharmaceuticals and foods and the like
US5258436A (en) * 1989-12-19 1993-11-02 Fmc Corporation Film-forming composition; method of producing same and use for coating pharmaceuticals and foods and the like
US5266331A (en) * 1991-11-27 1993-11-30 Euroceltique, S.A. Controlled release oxycodone compositions
US5273760A (en) * 1991-12-24 1993-12-28 Euroceltigue, S.A. Stabilized controlled release substrate having a coating derived from an aqueous dispersion of hydrophobic polymer
US5283065A (en) * 1989-09-21 1994-02-01 American Cyanamid Company Controlled release pharmaceutical compositions from spherical granules in tabletted oral dosage unit form
US5284662A (en) * 1990-10-01 1994-02-08 Ciba-Geigy Corp. Oral osmotic system for slightly soluble active agents
US5286493A (en) * 1992-01-27 1994-02-15 Euroceltique, S.A. Stabilized controlled release formulations having acrylic polymer coating
US5292461A (en) * 1990-08-24 1994-03-08 Juch Rolf Dieter Process for the production of pellets
US5321012A (en) * 1993-01-28 1994-06-14 Virginia Commonwealth University Medical College Inhibiting the development of tolerance to and/or dependence on a narcotic addictive substance
US5330766A (en) * 1989-01-06 1994-07-19 F. H. Faulding & Co. Limited Sustained release pharmaceutical composition
US5356467A (en) * 1992-08-13 1994-10-18 Euroceltique S.A. Controlled release coatings derived from aqueous dispersions of zein
US5384130A (en) * 1990-04-18 1995-01-24 Asahi Kasei Kogyo Kabushiki Kaisha Spherical seed cores, spherical granules and process for production thereof
US5411745A (en) * 1994-05-25 1995-05-02 Euro-Celtique, S.A. Powder-layered morphine sulfate formulations
US5456923A (en) * 1991-04-16 1995-10-10 Nippon Shinyaku Company, Limited Method of manufacturing solid dispersion
US5460826A (en) * 1994-06-27 1995-10-24 Alza Corporation Morphine therapy
US5472712A (en) * 1991-12-24 1995-12-05 Euroceltique, S.A. Controlled-release formulations coated with aqueous dispersions of ethylcellulose
US5478577A (en) * 1993-11-23 1995-12-26 Euroceltique, S.A. Method of treating pain by administering 24 hour oral opioid formulations exhibiting rapid rate of initial rise of plasma drug level
US5500227A (en) * 1993-11-23 1996-03-19 Euro-Celtique, S.A. Immediate release tablet cores of insoluble drugs having sustained-release coating
US5502058A (en) * 1993-03-05 1996-03-26 Virginia Commonwealth University Method for the treatment of pain
US5508403A (en) * 1988-08-02 1996-04-16 Nissan Chemical Industries Ltd. Phosphorus pyridine compound
US5520931A (en) * 1992-07-29 1996-05-28 Gacell Laboratories Ab Controlled release morphine preparation
US5580578A (en) * 1992-01-27 1996-12-03 Euro-Celtique, S.A. Controlled release formulations coated with aqueous dispersions of acrylic polymers
US5601842A (en) * 1993-09-03 1997-02-11 Gruenenthal Gmbh Sustained release drug formulation containing a tramadol salt
US5614218A (en) * 1993-03-30 1997-03-25 Pharmacia & Upjohn Aktiebolag Controlled release preparation
US5629011A (en) * 1992-02-05 1997-05-13 Danbiosyst Uk Limited Composition for nasal administration
US5637320A (en) * 1990-01-15 1997-06-10 Elan Corporation, Plc Controlled absorption naproxen formulation for once-daily administration
US5670172A (en) * 1991-08-12 1997-09-23 Euro-Celtique, S.A. Pharmaceutical spheroid formulation
US5681585A (en) * 1991-12-24 1997-10-28 Euro-Celtique, S.A. Stabilized controlled release substrate having a coating derived from an aqueous dispersion of hydrophobic polymer
US5811126A (en) * 1995-10-02 1998-09-22 Euro-Celtique, S.A. Controlled release matrix for pharmaceuticals
US5843480A (en) * 1994-03-14 1998-12-01 Euro-Celtique, S.A. Controlled release diamorphine formulation
US5849240A (en) * 1993-11-23 1998-12-15 Euro-Celtique, S.A. Method of preparing sustained release pharmaceutical compositions
US5856295A (en) * 1995-03-25 1999-01-05 Quest International B.V. Fragrance material
US5866164A (en) * 1996-03-12 1999-02-02 Alza Corporation Composition and dosage form comprising opioid antagonist
US5879705A (en) * 1993-07-27 1999-03-09 Euro-Celtique S.A. Sustained release compositions of morphine and a method of preparing pharmaceutical compositions
US5891471A (en) * 1993-11-23 1999-04-06 Euro-Celtique, S.A. Pharmaceutical multiparticulates
US5914131A (en) * 1994-07-07 1999-06-22 Alza Corporation Hydromorphone therapy
US5948787A (en) * 1997-02-28 1999-09-07 Alza Corporation Compositions containing opiate analgesics
US5958452A (en) * 1994-11-04 1999-09-28 Euro-Celtique, S.A. Extruded orally administrable opioid formulations
US5958459A (en) * 1991-12-24 1999-09-28 Purdue Pharma L.P. Opioid formulations having extended controlled released
US5968551A (en) * 1991-12-24 1999-10-19 Purdue Pharma L.P. Orally administrable opioid formulations having extended duration of effect
US6103261A (en) * 1993-07-01 2000-08-15 Purdue Pharma Lp Opioid formulations having extended controlled release
US6245357B1 (en) * 1998-03-06 2001-06-12 Alza Corporation Extended release dosage form
US6419960B1 (en) * 1998-12-17 2002-07-16 Euro-Celtique S.A. Controlled release formulations having rapid onset and rapid decline of effective plasma drug concentrations
US20030224051A1 (en) * 2002-05-31 2003-12-04 Fink Tracy A. Dosage forms and compositions for osmotic delivery of variable dosages of oxycodone
US20040010000A1 (en) * 2002-04-29 2004-01-15 Ayer Atul D. Methods and dosage forms for controlled delivery of oxycodone
US6696066B2 (en) * 1997-12-22 2004-02-24 Euro-Celtique S.A. Opioid agonist/antagonist combinations
US6733783B2 (en) * 2000-10-30 2004-05-11 Euro-Celtique S.A. Controlled release hydrocodone formulations
US20050106249A1 (en) * 2002-04-29 2005-05-19 Stephen Hwang Once-a-day, oral, controlled-release, oxycodone dosage forms
US20050245556A1 (en) * 2002-04-05 2005-11-03 Bianca Brogmann Pharmaceutical preparation containing oxycodone and naloxone

Family Cites Families (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA635283A (en) 1962-01-23 Olin Mathieson Chemical Corporation Pellets for prolonged drug action
DE2966893D1 (en) 1978-10-02 1984-05-17 Purdue Research Foundation Foods and pharmaceutical coating composition, method of preparation and products so coated
CA1146866A (en) 1979-07-05 1983-05-24 Yamanouchi Pharmaceutical Co. Ltd. Process for the production of sustained release pharmaceutical composition of solid medical material
EP0108218A3 (en) 1982-10-08 1984-11-28 Verex Laboratories, Inc. Constant release rate solid oral dosage formulation of pharmaceutical compounds having a high degree of water solubility
GB2140687B (en) 1983-05-11 1987-03-18 Alza Corp Osmotic drug delivery system
EP0147780A3 (en) 1984-01-03 1987-03-11 Merck &amp; Co., Inc. Drug delivery device
GB8601389D0 (en) 1985-01-30 1986-02-26 Warner Lambert Co Treating pharmaceutical dosage forms
US4772475A (en) 1985-03-08 1988-09-20 Yamanouchi Pharmaceutical Co., Ltd. Controlled-release multiple units pharmaceutical formulation
GB8519310D0 (en) 1985-07-31 1985-09-04 Zyma Sa Granular active substances
GB2186485B (en) 1986-02-13 1988-09-07 Ethical Pharma Ltd Slow release formulation
US4760094A (en) 1986-10-21 1988-07-26 American Home Products Corporation (Del.) Spray dried acetaminophen
GB2206046B (en) 1987-06-25 1991-04-03 Alza Corp Multi-unit delivery system
EP0327295A3 (en) 1988-02-01 1989-09-06 F.H. FAULDING &amp; CO. LTD. Tetracycline dosage form
GB8820327D0 (en) 1988-08-26 1988-09-28 May & Baker Ltd New compositions of matter
DE68916497T2 (en) 1988-09-30 1994-11-17 Rhone Poulenc Rorer Ltd Pharmaceutical granule.
CA2007181C (en) 1989-01-06 1998-11-24 Angelo Mario Morella Sustained release pharmaceutical composition
CA2007055A1 (en) 1989-01-06 1990-07-06 Garth Boehm Theophylline dosage form
US5326572A (en) 1989-03-23 1994-07-05 Fmc Corporation Freeze-dried polymer dispersions and the use thereof in preparing sustained-release pharmaceutical compositions
DE415693T1 (en) 1989-08-28 1991-10-17 Arizona Technology Development Corp., Tucson, Ariz., Us Composition and method for selectively enhancing opiate activity and reduction of opiate tolerance and dependence.
CA2031150C (en) 1989-12-01 2000-11-21 Dale R. Brinker Sustained-release drug dosage units
EP0452145B1 (en) 1990-04-12 1996-11-13 SHIONOGI SEIYAKU KABUSHIKI KAISHA trading under the name of SHIONOGI &amp; CO. LTD. Coated composition and its preparation process
WO1992001446A1 (en) 1990-07-20 1992-02-06 Aps Research Limited Sustained-release formulations
FR2665357B1 (en) 1990-07-31 1995-03-31 Aiache Jean Marc Process for preparing a pharmaceutical dosage bio-adhesive form and dosage form and prepared.
ES2081498T3 (en) 1990-10-16 1996-03-16 Pharmacia Ab A method for drug formulation and a pharmaceutical composition.
DE69129861T2 (en) 1990-11-16 1999-04-01 Pharmacia & Upjohn Ab Topical agent for transdermal administration of prodrug derivatives of morphine
EP0566709B3 (en) 1991-09-06 2009-04-08 Ortho-McNeil-Janssen Pharmaceuticals, Inc. Composition comprising a tramadol compound and acetaminophen, and its use
DK0534628T3 (en) 1991-09-06 1996-12-09 Mcneilab Inc Compositions containing a tramadol material and any one of codeine, oxycodone or hydrocodone, and their use
US5223541A (en) 1991-09-13 1993-06-29 Mcneilab, Inc. Tramadol n-oxide material, enantiomers and compositions thereof, and their use
GB9121204D0 (en) 1991-10-04 1991-11-20 Euro Celtique Sa Medicament
US5288502A (en) 1991-10-16 1994-02-22 The University Of Texas System Preparation and uses of multi-phase microspheres
WO1993007859A1 (en) 1991-10-23 1993-04-29 Warner-Lambert Company Novel pharmaceutical pellets and process for their production
KR100236562B1 (en) 1991-10-30 2000-03-02 랄프 알. 팔로 Composition comprising a tramadol and a non-steroidal anti-inflammatory drug
DE4138513A1 (en) 1991-11-23 1993-05-27 Basf Ag A solid pharmaceutical sustained-release form
US5656295A (en) 1991-11-27 1997-08-12 Euro-Celtique, S.A. Controlled release oxycodone compositions
DE69311800T2 (en) 1992-03-20 1998-01-08 Pharmacia & Upjohn Ab A process for producing sustained-release pellets
JP3207495B2 (en) 1992-04-02 2001-09-10 ロート製薬株式会社 Sustained release suspension formulation having a stable release
EP0653935B1 (en) 1992-08-05 2002-05-08 F.H. FAULDING &amp; CO. LIMITED Pelletised pharmaceutical composition
WO1994005262A1 (en) 1992-09-10 1994-03-17 F.H. Faulding & Co. Limited Sustained release matrix composition
JP2616252B2 (en) 1992-10-16 1997-06-04 日本新薬株式会社 Preparation of the wax matrix
ES2124372T5 (en) 1993-07-01 2004-07-16 Euro-Celtique S.A. Sustained release compositions containing morphine.
US5529787A (en) 1994-07-07 1996-06-25 Alza Corporation Hydromorphone therapy
US6066339A (en) 1997-10-17 2000-05-23 Elan Corporation, Plc Oral morphine multiparticulate formulation
CA2379987A1 (en) 1999-07-29 2001-02-08 Roxane Laboratories, Inc. Opioid sustained-released formulation
CN100356907C (en) 2001-06-08 2007-12-26 恩德制药公司 Controlled release dosage forms using acrylic polymer, and process for making
EP1406630A1 (en) 2001-07-06 2004-04-14 Endo Pharmaceuticals Inc. Parenteral administration of 6-hydroxy-oxymorphone for use as an analgesic
WO2003013525A1 (en) 2001-08-06 2003-02-20 Euro-Celtique S.A. Opioid agonist formulations with releasable and sequestered antagonist
DE10215067A1 (en) 2002-04-05 2003-10-16 Euro Celtique Sa Stable pharmaceutical preparation useful for the treatment of pain, especially severe pain, without causing side-effects comprises oxycodone and naxolone in retarded release formulation
RU2006118323A (en) 2003-10-29 2007-12-10 Алза Корпорейшн (Us) Dosage forms with controlled release of oxycodone for a single oral administration
JP4970045B2 (en) 2003-12-05 2012-07-04 ケアフュージョン 303、インコーポレイテッド Patient self-controlled analgesia using the patient monitoring system
JP2008047405A (en) 2006-08-15 2008-02-28 Toshiba Corp Socket for fuel cell and fuel cell using the same
EP2073797A2 (en) 2006-10-11 2009-07-01 Alpharma, Inc. Pharmaceutical compositions
US7881540B2 (en) 2006-12-05 2011-02-01 Fujifilm Corporation Method and apparatus for detection using cluster-modified graph cuts
WO2009002148A1 (en) 2007-06-27 2008-12-31 N.V. Nutricia Food composition for prodromal dementia patients
US8623418B2 (en) 2007-12-17 2014-01-07 Alpharma Pharmaceuticals Llc Pharmaceutical composition
EP2224805A4 (en) 2007-12-17 2013-10-16 Alpharma Pharmaceuticals Llc Pharmaceutical composition
DE102008052176B4 (en) 2008-10-17 2013-11-14 Siemens Medical Instruments Pte. Ltd. Method and hearing aid parameter adaptation by detecting a speech recognition threshold
RU2541159C2 (en) 2010-10-26 2015-02-10 АЛФАРМА ФАРМАСЬЮТИКЭЛЗ, ЭлЭлСи Compositions and method for relieving respiratory distress caused by opioid overdose
WO2012104752A1 (en) 2011-02-02 2012-08-09 Alpharma Pharmaceuticals, Llc Pharmaceutical composition comprising opioid agonist and sequestered antagonist

Patent Citations (98)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738303A (en) * 1952-07-18 1956-03-13 Smith Kline French Lab Sympathomimetic preparation
US2921883A (en) * 1957-05-03 1960-01-19 Smith Kline French Lab Novel coating material for medicaments
US3082154A (en) * 1960-04-19 1963-03-19 Ici Ltd Improved free-flowing coated antimalarial salts in particulate form
US3492397A (en) * 1967-04-07 1970-01-27 Warner Lambert Pharmaceutical Sustained release dosage in the pellet form and process thereof
US3773920A (en) * 1971-07-14 1973-11-20 Nikken Chemicals Co Ltd Sustained release medicinal composition
US3965256A (en) * 1972-05-16 1976-06-22 Synergistics Slow release pharmaceutical compositions
US3922339A (en) * 1974-06-20 1975-11-25 Kv Pharm Co Sustained release medicant
US4327725A (en) * 1980-11-25 1982-05-04 Alza Corporation Osmotic device with hydrogel driving member
US4455143A (en) * 1982-03-22 1984-06-19 Alza Corporation Osmotic device for dispensing two different medications
US4443428A (en) * 1982-06-21 1984-04-17 Euroceltique, S.A. Extended action controlled release compositions
US4722815A (en) * 1984-12-27 1988-02-02 Japan Liquid Crystal Co., Ltd. Process of making a synthetic resin product containing a molecular inclusion compound in cyclodextrin
US4708874A (en) * 1985-03-13 1987-11-24 Rijksuniversiteit Groningen Devices for the controlled release of active substances, as well as process for the preparation thereof
US4834985A (en) * 1986-06-05 1989-05-30 Euroceltique S.A. Controlled release pharmaceutical composition
US4828836A (en) * 1986-06-05 1989-05-09 Euroceltique S.A. Controlled release pharmaceutical composition
US4834984A (en) * 1986-06-10 1989-05-30 Euroceltique S.A. Controlled release dihydrocodeine composition
US4861598A (en) * 1986-07-18 1989-08-29 Euroceltique, S.A. Controlled release bases for pharmaceuticals
US4970075A (en) * 1986-07-18 1990-11-13 Euroceltique, S.A. Controlled release bases for pharmaceuticals
US4844909A (en) * 1986-10-31 1989-07-04 Euroceltique, S.A. Controlled release hydromorphone composition
US4990341A (en) * 1986-10-31 1991-02-05 Euroceltique, S.A. Controlled release hydromorphone composition
US5026560A (en) * 1987-01-29 1991-06-25 Takeda Chemical Industries, Ltd. Spherical granules having core and their production
US5219575A (en) * 1987-06-26 1993-06-15 Duphar International Research B.V. Compositions with controlled zero-order delivery rate and method of preparing these compositions
US5068110A (en) * 1987-09-29 1991-11-26 Warner-Lambert Company Stabilization of enteric coated dosage form
US5508403A (en) * 1988-08-02 1996-04-16 Nissan Chemical Industries Ltd. Phosphorus pyridine compound
US5178868A (en) * 1988-10-26 1993-01-12 Kabi Pharmacia Aktiebolaq Dosage form
US5071646A (en) * 1988-11-11 1991-12-10 Euroceltique, S.A. Pharmaceutical ion exchange resin composition
US5330766A (en) * 1989-01-06 1994-07-19 F. H. Faulding & Co. Limited Sustained release pharmaceutical composition
US5202128A (en) * 1989-01-06 1993-04-13 F. H. Faulding & Co. Limited Sustained release pharmaceutical composition
US5196203A (en) * 1989-01-06 1993-03-23 F. H. Faulding & Co. Limited Theophylline dosage form
US5378474A (en) * 1989-01-06 1995-01-03 F. H. Faulding & Co. Limited Sustained release pharmaceutical composition
US5126145A (en) * 1989-04-13 1992-06-30 Upsher Smith Laboratories Inc Controlled release tablet containing water soluble medicament
US5122384A (en) * 1989-05-05 1992-06-16 Kv Pharmaceutical Company Oral once-per-day organic nitrate formulation which does not induce tolerance
US5133974A (en) * 1989-05-05 1992-07-28 Kv Pharmaceutical Company Extended release pharmaceutical formulations
US5098718A (en) * 1989-06-12 1992-03-24 Rhone-Poulenc Sante Enzymatically degradable coating compositions for feed additives intended for ruminants
US5030400A (en) * 1989-07-03 1991-07-09 A/S Niro Atomizer Process and an apparatus for agglomeration of a powdery material
US5283065A (en) * 1989-09-21 1994-02-01 American Cyanamid Company Controlled release pharmaceutical compositions from spherical granules in tabletted oral dosage unit form
US5169645A (en) * 1989-10-31 1992-12-08 Duquesne University Of The Holy Ghost Directly compressible granules having improved flow properties
US5098714A (en) * 1989-11-16 1992-03-24 Alza Corporation Osmotic, oral dosage form for fertility control
US5248516A (en) * 1989-12-19 1993-09-28 Fmc Corporation Film-forming composition: method of producing same and use for coating pharmaceuticals and foods and the like
US5258436A (en) * 1989-12-19 1993-11-02 Fmc Corporation Film-forming composition; method of producing same and use for coating pharmaceuticals and foods and the like
US5637320A (en) * 1990-01-15 1997-06-10 Elan Corporation, Plc Controlled absorption naproxen formulation for once-daily administration
US5206030A (en) * 1990-02-26 1993-04-27 Fmc Corporation Film-forming composition and use for coating pharmaceuticals, foods and the like
US5384130A (en) * 1990-04-18 1995-01-24 Asahi Kasei Kogyo Kabushiki Kaisha Spherical seed cores, spherical granules and process for production thereof
US5292461A (en) * 1990-08-24 1994-03-08 Juch Rolf Dieter Process for the production of pellets
US5156850A (en) * 1990-08-31 1992-10-20 Alza Corporation Dosage form for time-varying patterns of drug delivery
US5284662A (en) * 1990-10-01 1994-02-08 Ciba-Geigy Corp. Oral osmotic system for slightly soluble active agents
US5132142A (en) * 1991-03-19 1992-07-21 Glatt Gmbh Apparatus and method for producing pellets by layering power onto particles
US5456923A (en) * 1991-04-16 1995-10-10 Nippon Shinyaku Company, Limited Method of manufacturing solid dispersion
US5670172A (en) * 1991-08-12 1997-09-23 Euro-Celtique, S.A. Pharmaceutical spheroid formulation
US5215758A (en) * 1991-09-11 1993-06-01 Euroceltique, S.A. Controlled release matrix suppository for pharmaceuticals
US5549912A (en) * 1991-11-27 1996-08-27 Euro-Celtique, S.A. Controlled release oxycodone compositions
US5266331A (en) * 1991-11-27 1993-11-30 Euroceltique, S.A. Controlled release oxycodone compositions
US5508042A (en) * 1991-11-27 1996-04-16 Euro-Celtigue, S.A. Controlled release oxycodone compositions
US5273760A (en) * 1991-12-24 1993-12-28 Euroceltigue, S.A. Stabilized controlled release substrate having a coating derived from an aqueous dispersion of hydrophobic polymer
US6294195B1 (en) * 1991-12-24 2001-09-25 Purdue Pharma L.P. Orally administrable opioid formulations having extended duration of effect
US5958459A (en) * 1991-12-24 1999-09-28 Purdue Pharma L.P. Opioid formulations having extended controlled released
US5472712A (en) * 1991-12-24 1995-12-05 Euroceltique, S.A. Controlled-release formulations coated with aqueous dispersions of ethylcellulose
US5968551A (en) * 1991-12-24 1999-10-19 Purdue Pharma L.P. Orally administrable opioid formulations having extended duration of effect
US5681585A (en) * 1991-12-24 1997-10-28 Euro-Celtique, S.A. Stabilized controlled release substrate having a coating derived from an aqueous dispersion of hydrophobic polymer
US5286493A (en) * 1992-01-27 1994-02-15 Euroceltique, S.A. Stabilized controlled release formulations having acrylic polymer coating
US5580578A (en) * 1992-01-27 1996-12-03 Euro-Celtique, S.A. Controlled release formulations coated with aqueous dispersions of acrylic polymers
US5629011A (en) * 1992-02-05 1997-05-13 Danbiosyst Uk Limited Composition for nasal administration
US5167964A (en) * 1992-02-14 1992-12-01 Warner-Lambert Company Semi-enteric drug delivery systems and methods for preparing same
US5520931A (en) * 1992-07-29 1996-05-28 Gacell Laboratories Ab Controlled release morphine preparation
US5356467A (en) * 1992-08-13 1994-10-18 Euroceltique S.A. Controlled release coatings derived from aqueous dispersions of zein
US5321012A (en) * 1993-01-28 1994-06-14 Virginia Commonwealth University Medical College Inhibiting the development of tolerance to and/or dependence on a narcotic addictive substance
US5502058A (en) * 1993-03-05 1996-03-26 Virginia Commonwealth University Method for the treatment of pain
US5614218A (en) * 1993-03-30 1997-03-25 Pharmacia & Upjohn Aktiebolag Controlled release preparation
US6143322A (en) * 1993-07-01 2000-11-07 Purdue Pharma L.P. Method of treating humans with opioid formulations having extended controlled release
US6103261A (en) * 1993-07-01 2000-08-15 Purdue Pharma Lp Opioid formulations having extended controlled release
US5879705A (en) * 1993-07-27 1999-03-09 Euro-Celtique S.A. Sustained release compositions of morphine and a method of preparing pharmaceutical compositions
US5601842A (en) * 1993-09-03 1997-02-11 Gruenenthal Gmbh Sustained release drug formulation containing a tramadol salt
US5891471A (en) * 1993-11-23 1999-04-06 Euro-Celtique, S.A. Pharmaceutical multiparticulates
US5500227A (en) * 1993-11-23 1996-03-19 Euro-Celtique, S.A. Immediate release tablet cores of insoluble drugs having sustained-release coating
US5965163A (en) * 1993-11-23 1999-10-12 Euro-Celtique, S.A. Substained release compositions and a method of preparing pharmaceutical compositions
US5849240A (en) * 1993-11-23 1998-12-15 Euro-Celtique, S.A. Method of preparing sustained release pharmaceutical compositions
US5672360A (en) * 1993-11-23 1997-09-30 Purdue Pharma, L.P. Method of treating pain by administering 24 hour oral opioid formulations
US5478577A (en) * 1993-11-23 1995-12-26 Euroceltique, S.A. Method of treating pain by administering 24 hour oral opioid formulations exhibiting rapid rate of initial rise of plasma drug level
US5843480A (en) * 1994-03-14 1998-12-01 Euro-Celtique, S.A. Controlled release diamorphine formulation
US5411745A (en) * 1994-05-25 1995-05-02 Euro-Celtique, S.A. Powder-layered morphine sulfate formulations
US5593695A (en) * 1994-06-27 1997-01-14 Alza Corporation Morphine therapy
US5667805A (en) * 1994-06-27 1997-09-16 Alza Corporation Morphine therapy
US5460826A (en) * 1994-06-27 1995-10-24 Alza Corporation Morphine therapy
US5914131A (en) * 1994-07-07 1999-06-22 Alza Corporation Hydromorphone therapy
US5958452A (en) * 1994-11-04 1999-09-28 Euro-Celtique, S.A. Extruded orally administrable opioid formulations
US6261599B1 (en) * 1994-11-04 2001-07-17 Euro-Celtique, S.A. Melt-extruded orally administrable opioid formulations
US5856295A (en) * 1995-03-25 1999-01-05 Quest International B.V. Fragrance material
US5811126A (en) * 1995-10-02 1998-09-22 Euro-Celtique, S.A. Controlled release matrix for pharmaceuticals
US5866164A (en) * 1996-03-12 1999-02-02 Alza Corporation Composition and dosage form comprising opioid antagonist
US5948787A (en) * 1997-02-28 1999-09-07 Alza Corporation Compositions containing opiate analgesics
US6696066B2 (en) * 1997-12-22 2004-02-24 Euro-Celtique S.A. Opioid agonist/antagonist combinations
US6245357B1 (en) * 1998-03-06 2001-06-12 Alza Corporation Extended release dosage form
US6419960B1 (en) * 1998-12-17 2002-07-16 Euro-Celtique S.A. Controlled release formulations having rapid onset and rapid decline of effective plasma drug concentrations
US7514100B2 (en) * 2000-10-30 2009-04-07 Purdue Pharma L.P. Controlled release hydrocodone formulations
US6733783B2 (en) * 2000-10-30 2004-05-11 Euro-Celtique S.A. Controlled release hydrocodone formulations
US20050245556A1 (en) * 2002-04-05 2005-11-03 Bianca Brogmann Pharmaceutical preparation containing oxycodone and naloxone
US20040010000A1 (en) * 2002-04-29 2004-01-15 Ayer Atul D. Methods and dosage forms for controlled delivery of oxycodone
US20050106249A1 (en) * 2002-04-29 2005-05-19 Stephen Hwang Once-a-day, oral, controlled-release, oxycodone dosage forms
US20030224051A1 (en) * 2002-05-31 2003-12-04 Fink Tracy A. Dosage forms and compositions for osmotic delivery of variable dosages of oxycodone

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Curtis et al. (Eur J Clin Pharmacol (1999) 55: 425-429) *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9707179B2 (en) 2001-09-21 2017-07-18 Egalet Ltd. Opioid polymer release system
US9694080B2 (en) 2001-09-21 2017-07-04 Egalet Ltd. Polymer release system
US8808745B2 (en) 2001-09-21 2014-08-19 Egalet Ltd. Morphine polymer release system
US8877241B2 (en) 2003-03-26 2014-11-04 Egalet Ltd. Morphine controlled release system
US9884029B2 (en) 2003-03-26 2018-02-06 Egalet Ltd. Morphine controlled release system
US9375428B2 (en) 2003-03-26 2016-06-28 Egalet Ltd. Morphine controlled release system
US8920836B2 (en) 2004-02-12 2014-12-30 Euro-Celtique S.A. Particulates
US20090029170A1 (en) * 2004-02-12 2009-01-29 Geoffrey Gerard Hayes Extrusion
US9603802B2 (en) 2004-02-12 2017-03-28 Euro-Celtique S.A. Extrusion
US20070298103A1 (en) * 2004-02-12 2007-12-27 Euro-Celtique S.A. Particulates
US9642809B2 (en) 2007-06-04 2017-05-09 Egalet Ltd. Controlled release pharmaceutical compositions for prolonged effect
US9358295B2 (en) 2009-02-06 2016-06-07 Egalet Ltd. Immediate release composition resistant to abuse by intake of alcohol
US9005660B2 (en) 2009-02-06 2015-04-14 Egalet Ltd. Immediate release composition resistant to abuse by intake of alcohol
US9023394B2 (en) 2009-06-24 2015-05-05 Egalet Ltd. Formulations and methods for the controlled release of active drug substances
US9044402B2 (en) 2012-07-06 2015-06-02 Egalet Ltd. Abuse-deterrent pharmaceutical compositions for controlled release
US9492444B2 (en) 2013-12-17 2016-11-15 Pharmaceutical Manufacturing Research Services, Inc. Extruded extended release abuse deterrent pill
US9707184B2 (en) 2014-07-17 2017-07-18 Pharmaceutical Manufacturing Research Services, Inc. Immediate release abuse deterrent liquid fill dosage form
US9861629B1 (en) 2015-10-07 2018-01-09 Banner Life Sciences Llc Opioid abuse deterrent dosage forms
US9943513B1 (en) 2015-10-07 2018-04-17 Banner Life Sciences Llc Opioid abuse deterrent dosage forms

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