WO2010046932A2 - Extended release pharmaceutical composition of minocycline and process thereof - Google Patents

Extended release pharmaceutical composition of minocycline and process thereof Download PDF

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Publication number
WO2010046932A2
WO2010046932A2 PCT/IN2009/000596 IN2009000596W WO2010046932A2 WO 2010046932 A2 WO2010046932 A2 WO 2010046932A2 IN 2009000596 W IN2009000596 W IN 2009000596W WO 2010046932 A2 WO2010046932 A2 WO 2010046932A2
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WO
WIPO (PCT)
Prior art keywords
dissolving component
pharmaceutical composition
extended release
minocycline
release pharmaceutical
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Application number
PCT/IN2009/000596
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French (fr)
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WO2010046932A3 (en
Inventor
Maulik Kiritkumar Panchal
Gour Mukherji
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Jubilant Organosys Limited
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Publication of WO2010046932A2 publication Critical patent/WO2010046932A2/en
Publication of WO2010046932A3 publication Critical patent/WO2010046932A3/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/20—Pills, tablets, discs, rods
    • A61K9/2004—Excipients; Inactive ingredients
    • A61K9/2022—Organic macromolecular compounds
    • A61K9/205—Polysaccharides, e.g. alginate, gums; Cyclodextrin
    • A61K9/2054—Cellulose; Cellulose derivatives, e.g. hydroxypropyl methylcellulose
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/20—Pills, tablets, discs, rods
    • A61K9/2004—Excipients; Inactive ingredients
    • A61K9/2013—Organic compounds, e.g. phospholipids, fats
    • A61K9/2018—Sugars, or sugar alcohols, e.g. lactose, mannitol; Derivatives thereof, e.g. polysorbates

Definitions

  • This invention in general relates to pharmaceutical compositions of minocycline or pharmaceutically acceptable salts thereof. More particularly, the present invention relates to extended release once-a-day pharmaceutical composition of minocycline or pharmaceutically acceptable salts and process for preparing thereof.
  • Minocycline and its non-toxic acid addition salts are widely used as antimicrobial agents and is disclosed in US Patent Nos. 3,148,212 and 3,226,436.
  • Minocycline hydrochloride a pharmaceutically acceptable salt has been available in the United States in the form of immediate release oral tablets and capsules containing 50 to 100 mg of the drug. It is typically administered in humans in doses of about 200 mg initially followed by 100 mg every twelve hours; or 200 mg initially followed by 50 mg every six hours. In a typical patient, this results in about a 4.5 mg/kg dose on the first day of treatment, and 3.0 mg/kg/day dose each day thereafter. It has been reported that low doses of minocycline antibiotic show improvement in acne due to the anti-inflammatory activity.
  • Solodyn ® is a currently marketed minocycline hydrochloride extended release dosage form containing 45, 90 & 135 mg of the drug. Inactive ingredients are listed as lactose monohydrate NF, hypromellose type 2910 USP, magnesium stearate NF, colloidal silica NF and carnauba wax NF. The tablets are coated with (colored)
  • Tetracycline compounds are widely used in therapy primarily for their antimicrobial effect.
  • a preferred family of such agents comprises the 7- or 9- alkylamino-6-deoxy-6-demethyltetracyclines, including the non-toxic acid-addition salts thereof.
  • Commonly assigned Boothe et al, US Pat. No. 3,148,212, and Petisi et al, US Pat. No. 3,226,436, describe the preparation of this family of tetracycline compounds.
  • US Patent No 5,283,065 assigned to American Cynamid discloses a controlled release pharmaceutical composition in oral tablet dosage form comprising two types of granules, active granules and compressible granules.
  • the active granules include the active ingredient blended with a diluent and the compressible granules include a mono or disaccharide in a diffusible matrix.
  • the compressible granules distort and fill voids to provide a cushion to prevent the active granules from breaking through during tableting process. This protects any loss of controlled release properties.
  • US Patent No 5,413,777 assigned to American Cynamid discloses a pulsatile once a day delivery system which maintains therapeutic blood level concentrations of minocycline in a patient for twenty-four hours.
  • the dosage form comprises an initial loading or first pulse of minocycline powder or minocycline containing coated or uncoated quick release granules. It also includes a second loading or second pulse of minocycline containing pH sensitive coated spherical granules, administered either simultaneously or separately up to about 120 minutes apart.
  • PCT Publication No. 2007/001961 assigned to Medicis discloses preparation of once-a-day formulation of minocycline hydrochloride used for the treatment of acne vulgaris. This application teaches range of fast dissolving carrier to slow dissolving carrier and concentration of hydroxypropyl methylcellulose (23 to 27% by wt of tablet).
  • PCT Publication No. 2004/078111 assigned to Ranbaxy relates to extended release pharmaceutical composition of minocycline or pharmaceutically acceptable salts thereof.
  • This application discloses preparation of matrix tablets of minocycline hydrochloride having two or more hydrophilic polymers.
  • an extended release pharmaceutical composition comprising minocycline or pharmaceutically acceptable salt thereof, a rapid dissolving component (s) and a slow dissolving component (s), wherein weight ratio of rapid dissolving component(s) to slow dissolving component(s) is from about 0.8 to about 1.2.
  • the minocycline or pharmaceutically acceptable salt in the extended release pharmaceutical composition is present in an amount of about 0.1 to about 50% of total weight of the composition.
  • said slow dissolving component in the extended release pharmaceutical composition is present in an amount of about 10 to about 22% of total weight of the composition.
  • said weight ratio of the rapid dissolving component to the slow dissolving component in the extended release pharmaceutical composition is from about 0.9 to about 1.1.
  • said rapid dissolving component is lactose.
  • the slow dissolving component is hydroxypropyl methylcellulose.
  • the weight ratio of rapid dissolving component(s) to slow dissolving component(s) in the extended release pharmaceutical composition is the ratio of extragranular rapid dissolving component to the slow dissolving component in the pharmaceutical composition.
  • a process for manufacturing the extended release pharmaceutical composition comprising minocycline or pharmaceutically acceptable salts thereof wherein the process comprising dry mixing minocycline or pharmaceutically acceptable salts, slow dissolving component(s), rapid dissolving component(s) and optionally other pharmaceutical acceptable excipients, granulating the resultant blend using binder solution and drying the resultant granulates; subsequently mixing the dried granulates with rapid dissolving component(s), slow dissolving component(s) and optionally other pharmaceutically acceptable excipients, formulating the mixture into a suitable dosage form and further coating the said dosage form with a nonfunctional film coating layer.
  • the present invention relates to an extended release pharmaceutical composition comprising minocycline or pharmaceutically acceptable salts thereof to provide once a day dosage composition without any loading dose and a process for preparing the same.
  • salts of minocycline' includes salts that are pharmaceutically and therapeutically acceptable. Such salts are typically prepared from inorganic acids or bases and/or organic acids or bases. Examples of such acid and bases are well known to those of ordinary skilled in the art.
  • the invention contemplates the use of minocycline hydrochloride salt, although the use of other pharmaceutically acceptable salts is within the scope of the invention.
  • Extended release pharmaceutical composition or formulations which exhibit an "extended release" of the minocycline salt as used herein is defined to mean pharmaceutical composition administered once-a-day that provide a release of the minocycline salt in a manner which is sufficient to provide and maintain therapeutic concentration of minocycline for 24 .hours following its administration.
  • bioequivalent as used herein has its ordinary meaning as understood by those skilled in the art and thus includes, without limitation, a drug or dosage form that, upon administration to a suitable patient population, provides principle pharmacokinetic parameters, e.g., AUC and C max , that are in the range of 80% to 125% of those provided by a reference standard.
  • principle pharmacokinetic parameters e.g., AUC and C max
  • tablette as used herein includes tablets of any shape and includes caplets, which are tablets having a capsule shape.
  • Non-functional coatings are coatings that do not affect drug release, but which affect other properties, such as enhancement of the chemical, biological or physical characteristics, or the enhancement of the aesthetic appeal of the pharmaceutical composition.
  • Acne is a common disease characterized by various types of lesions.
  • the areas affected typically are areas of the skin where sebaceous glands are largest, most numerous, and most active.
  • the lesions associated with acne are usually categorized as a non-inflammatory.
  • Non inflammatory lesions include comedones. Comedones appear in two forms, open and closed. Comedones are thought to arise from abnormal follicular differentiation.
  • Compositions of the present invention are useful for the treatment of above mentioned and other types of acne.
  • C max as used herein means the maximum plasma/blood minocycline concentration achieved after oral administration of the extended pharmaceutical compositions of minocycline.
  • AUC area under the curve
  • AUC is a measure of bioavailability, which is calculated by integrating plasma concentrations levels of minocycline with respect to time.
  • the term 'composition' is used synonymously with the term 'formulation' and 'dosage form'.
  • Weight percentages as expressed herein, are relative to the total core tablet weight, excluding the weight of any coating, unless otherwise specified.
  • an extended release pharmaceutical composition comprises minocycline or pharmaceutically acceptable salts thereof, wherein the formulation provides a therapeutic effective amount of minocycline such that the dosage form is administrable to a subject on once a day basis without any loading dose.
  • the pharmaceutical composition thus provides therapeutic concentrations of minocycline for extended periods of time.
  • the extended release pharmaceutical composition comprises a functional core, said functional core comprising minocycline or pharmaceutically acceptable salts thereof, sustained release material(s) and other pharmaceutically acceptable excipients.
  • the pharmaceutical composition comprises minocycline or pharmaceutically acceptable salts thereof, sustained release material(s), predominantly hydrophilic or hydrophobic polymers and other pharmaceutically acceptable excipients wherein said sustained release material is one of the major constituent of the slow dissolving component.
  • the extended release pharmaceutical composition comprises a) minocycline or pharmaceutically acceptable salts thereof; : b) rapid dissolving component(s); and c) slow dissolving component(s); wherein weight ratio of said rapid dissolving component(s) to said slow dissolving component(s) is from about 0.8 to about 1.2
  • the weight ratio of said rapid dissolving component(s) to said slow dissolving component(s) is from about 0.9 to about 1.1.
  • compositions of minocycline or pharmaceutically acceptable salts according to the present invention encompass certain ratio of rapid- dissolving component and slow-dissolving component (i e., about 0.8 to about 1.2) which are critical for obtaining desired dissolution profile to achieve once-a-day composition and for achieving bioequivalence to the reference listed drug (Solodyn ® ).
  • the artisan will appreciate that the desired in-vitro release rate described herein for minocycline or pharmaceutically acceptable salts is achieved by controlling the release of drug from the core matrix.
  • the weight ratio of rapid dissolving component(s) to slow dissolving component(s) is from about 0.8 to about 1.2, preferably from about 0.9 to about 1.1.
  • the cited ratio of rapid dissolving component(s) to slow dissolving component(s) is the ratio of extragranular rapid dissolving component to slow dissolving component.
  • the rapid dissolving component is any water soluble excipient including filler that rapidly dissolves in an aqueous physiological medium, such as gastric fluid, thereby tending to rapidly release the active ingredient.
  • Water soluble filler includes sugar and sugar alcohols, inorganic salts or any combination thereof. Examples include sorbitol, mannitol, xylitol, inositol, lactose, fructose, sucrose, dextrose, lactitol, confectioner's sugar, potassium chloride, sodium chloride, sodium carbonate, sodium bicarbonate or any combination thereof and the like.
  • the preferred rapid dissolving component for the composition of the present invention is lactose which is commercially available as Pharmatose 200 M from DMV-Fonterra, UK. Rapid dissolving component may either be used intragranularly or extragranularly or both intragranularly and extragranularly. For the purpose of this invention, while calculating the weight ratios of rapid dissolving component(s) to slow dissolving component(s), rapid dissolving component used extragranularly is considered in calculations.
  • the amount of rapid dissolving component(s) may vary in the pharmaceutical composition of the present invention and it may be used in an amount of about 20 to about 70% by total weight of the core composition, preferably about 25 to about 60% and more preferably of about 30 to about 50%.
  • the slow dissolving component broadly includes materials that slow down the release of the drug from the matrix.
  • Slow dissolving components includes cellulosic polymers such as hydroxypropyl methylcellulose, hydroxypropylcellulose (e.g., KLUCEL ® HXF, KLUCEL ® EF) , cellulose acetate, ethyl cellulose or the like; gums such as guar gum, locust bean gum, xanthan gum, karaya gum or the like; oils or waxes such as hydrogenated vegetable oil, polyethylene glycol, or the like; neutral copolymer based on ethylacrylate and methylmethacrylate (available under brand name EUDRAGIT ® NE 30D); copolymer of acrylic acid and methacrylic acid esters with quaternary ammonium compounds (available under brand name Eudragit RL & RS); others such as polyvinylpyrrolidone, carbomers, polyvinyl acetate, ethy
  • Hydroxypropyl methylcellulose is the preferred choice of slow dissolving component. Hydroxypropyl methylcellulose used in the present invention is available in different viscosity grades such as those available under the brand name METHOCEL ® available. Both intragranular and/or extragranular, slow dissolving component(s) are considered while calculating the weight ratio of rapid dissolving component(s) to slow dissolving component(s).
  • the amount of the slow dissolving component(s) in the pharmaceutical composition according to the present invention generally varies from about 10 to about 22% by total weight of the composition, preferably from about 15 to about 22% and still more preferably from about 18 to about 22%.
  • the extended release pharmaceutical composition comprises about 0.1 to about 50% w/w of the minocycline or pharmaceutically acceptable salts, about 10 to about 22% w/w of the slow dissolving component, about 20 to about 70%w/w of the rapid dissolving component and optionally other pharmaceutically acceptable excipients.
  • both intragranular and/or extragranular, slow dissolving component(s) are considered while calculating the weight ratio of rapid dissolving component(s) to slow dissolving component(s) while for rapid dissolving component(s), only extragranular rapid dissolving component is considered for calculating said weight ratios.
  • the release rate of the minocycline or pharmaceutically acceptable salts is controlled not only by incorporating suitable amount of slow dissolving component but also by specific weight ratio of rapid dissolving component(s) to slow dissolving component(s).
  • the present weight ratio of 0.8 to 1.2 is critical for desired in vitro dissolution profile and in-vivo bioavailability of drugs.
  • the extended release composition in accordance with the invention comprises an intragranular rapid dissolving component, an extragranular rapid dissolving component, and a slow dissolving component, wherein said intragranular rapid dissolving component is completely or partially encapsulated or included or coated in said slow dissolving component, wherein said extragranular rapid dissolving component and said slow dissolving component are at a weight ratio of about 0.8 to about 1.2, preferably about 0.9 to about 1.1.
  • compositions of the present invention further comprises one or more pharmaceutically acceptable excipients, that assist in functionality and processing of formulation such as binders, disintegrants, lubricants, glidants, coloring agents, surfactants or flavors and the like.
  • pharmaceutically acceptable excipients that assist in functionality and processing of formulation
  • Lubricants which may be used in the composition of the present invention, include, but are not limited to, magnesium stearates, sodium stearates, calcium stearates, stearic acid, pregelatinised starch, sodium stearyl fumarate, sucrose esters of fatty acid, glyceryl behenate, polyethylene glycol, glyceryl monostearate or combination thereof.
  • Lubricants may be present in the composition of the present invention in an amount of from about 0.2 to about 10% by the total weight of the composition, preferably from about 0.5 to about 5% by the total weight of the composition.
  • Preferred lubricants are magnesium stearates and /or pregelatinised starch.
  • metallic stearates serves dual role in the pharmaceutical composition including slow dissolving component and lubricant.
  • Glidants or antiadherants which may be employed as part of the composition of the present invention, include, but are not limited to, talc, corn starch, colloidal silicon dioxide or combination thereof and other glidants well known to those skilled in the art.
  • Preferred glidant is colloidal silicon dioxide available under the brand name Aerosil ® 200.
  • Glidants may be used in the composition of the present invention in an amount of from about 0.2 to about 10% by the total weight of the composition, preferably from about 0.5 to about 5% by the total weight of the composition.
  • the optional disintegrant for the composition of the present invention can be selected from the group comprising of sodium starch glycolate, crosslinked polyvinyl pyrrolidone, croscarmellose sodium and low-substituted hydroxypropyl cellulose or combination thereof and the like.
  • Preferred disintegrants are croscarmellose sodium and crosslinked polyvinyl pyrrolidone (Polyplasdone-XL).
  • the disintegrant is used in an amount of less than 10% by the total weight of the composition.
  • Suitable coloring or flavoring agents include those approved for use by the United States Food and Drug Administration (FDA) and are well known to those skilled in the art.
  • FDA United States Food and Drug Administration
  • the granulating liquid used in the present invention includes aqueous or non aqueous solvents to dissolve or disperse the binder to prepare a binder solution.
  • solvents include water and isopropyl alcohol. These solvent may either be used alone or in combination with different ratios such as 90:10 (IPA: Water) and 80:20 (IPA: Water) in order to ensure better granulation characteristics.
  • Solvents used in the present invention are environment friendly and poses no occupational hazards to the workers.
  • Embodiments of the extended release pharmaceutical composition may include one or more of the following features.
  • the slow dissolving component includes sustained release material and constitutes from about 10 to about 22% w/w of the composition.
  • the release of minocycline hydrochloride from composition is modulated by sagacious selection of the rapid dissolving component(s), slow dissolving component(s) and their weight ratio(s).
  • Patent application US 20060293290 teaches that amount of slow dissolving component i.e., hydroxypropyl methylcellulose for 45, 90 & 135 mg minocycline strength ranges from 23.5 to 28% by weight of the total tablet.
  • amount of sustained release material i.e. Hydroxypropyl methylcellulose
  • it implicates present invention uses less amount of polymer thereby yields cost effective extended release composition of minocycline hydrochloride.
  • extended release composition of the present invention contains minocycline or pharmaceutically acceptable salts in therapeutically effective amount and hydroxypropyl methylcellulose in the range of about 10 to about 22%, preferably about 15 to about 22%, more preferably about 18 to about 22% by the weight of the core composition.
  • extended release composition of the present invention contains minocycline or pharmaceutically acceptable salts in therapeutically effective amount and about 20% of hydroxypropyl methylcellulose by weight of the core composition.
  • the extended release pharmaceutical composition of minocycline hydrochloride comprises (i) an intragranular blend of: 97.18 mg of minocycline hydrochloride (90 mg of minocycline hydrochloride free base equivalent), 60 mg of hydroxypropyl methylcellulose; and 73.18 mg of an intragranular lactose, wherein hydroxypropyl methylcellulose is slow dissolving component; (ii) 63.64 mg of extragranular lactose wherein extragranular lactose is a rapid dissolving component, (iii) 2 mg of silicon dioxide; and (iv) 4 mg of magnesium stearate as one of slow dissolving component.
  • the extended release pharmaceutical composition of minocycline hydrochloride comprises (i) an intragranular blend of: 145.77 mg of minocycline hydrochloride (135 mg of minocycline hydrochloride free base equivalent), 90 mg of hydroxypropyl methylcellulose; and 109.77 mg of an intragranular lactose, wherein hydroxypropyl methylcellulose is slow dissolving component; (ii) 95.46 mg of extragranular lactose wherein extragranular lactose is a rapid dissolving component, (iii) 3 mg of silicon dioxide; and (iv) 6 mg of magnesium stearate as one of slow dissolving component.
  • the extended release pharmaceutical composition of minocycline hydrochloride comprises (i) an intragranular blend of; 48.59 mg of minocycline hydrochloride (45 mg of minocycline hydrochloride free base equivalent), 30 mg of hydroxypropyl methylcellulose; and 36.59 mg of an intragranular lactose, wherein hydroxypropyl methylcellulose is slow dissolving component; (ii) 31.82 mg of extragranular lactose wherein extragranular lactose is a rapid dissolving component, (iii) 1 mg of silicon dioxide; and (iv) 2 mg of magnesium stearate as one of slow dissolving component.
  • a process for preparing an extended release pharmaceutical composition includes a mixture of minocycline or pharmaceutically acceptable salt thereof and sustained release material, wherein the process includes (a) preparing the functional core, and (b) optionally, forming the film coating on the core.
  • a process for preparing an extended release pharmaceutical composition comprising minocycline or pharmaceutically acceptable salt thereof, rapid dissolving component(s) and slow dissolving component(s), wherein in said composition contains the weight ratio of rapid dissolving component(s) to slow dissolving component(s) is from about 0.8 to about 1.2, preferably from about 0.9 to about 1.1.
  • the extended release pharmaceutical composition comprises a functional core of minocycline or pharmaceutically acceptable salt thereof, rapid dissolving component(s), slow dissolving component(s) and one or more pharmaceutically acceptable excipients, and non-functional film coating applied over the functional core wherein in said core contains the weight ratio of rapid dissolving component(s) to slow dissolving component(s) is from about 0.8 to about 1.2.
  • the extended release pharmaceutical composition comprises functional core of minocycline or pharmaceutically acceptable salt thereof, rapid dissolving component(s), slow dissolving component(s) and one or more pharmaceutically acceptable excipients, and non-functional film coating applied over the functional core wherein the amount of slow dissolving component(s) is about 10 to about 22% by the total weight of the core composition.
  • the present invention also provides for the process for manufacturing such compositions.
  • the pharmaceutical compositions of the present invention are dispensed in form of extended release tablets.
  • the extended release tablets may be optionally film coated but film coating in no way modulates the release of drug from the core of tablets. Modulation of extended release of drug from said tablets is effected by type and concentration of the sustained release material, in conjunction with the weight ratio of rapid dissolving component to slow dissolving component present in the core tablets.
  • the pharmaceutical composition of the present invention can be prepared by scale up or scale down procedure.
  • preparation of a single blend is sufficient for the production of all the three strengths (i.e., 45 mg, 90 mg & 135 mg of minocycline hydrochloride) and also such type of strategy does not affect the concentrations as well as the ratio of various excipients in the final composition.
  • the process also eliminates the confusion associated with the look-alike marketed extended release compositions of minocycline hydrochloride (Solodyn ® ).
  • the present composition is easy to scale up and produced on commercial scale.
  • the extended release pharmaceutical • composition is preferably prepared by wet granulation technique while other techniques of manufacturing such as fluid bed processing, dry granulation, direct compression or any other manufacturing technique known in the art, are also within the scope of the present invention.
  • the tablet may further be coated, which may comprise a non-functional or a functional polymer.
  • the process for preparation of extended release pharmaceutical composition of minocycline or pharmaceutically acceptable salts thereof comprises (i) dry mixing minocycline or pharmaceutically acceptable salts, slow dissolving component(s), rapid dissolving component(s) and optionally other pharmaceutical acceptable excipients, (ii) granulating the resultant blend with using binder solution and drying the resultant granulates; (iii) mixing the dried granulates with rapid dissolving component(s), slow dissolving component(s) and optionally other pharmaceutically acceptable excipients, (iv) formulating the mixture into suitable dosage form such as tablets; and finally (iv) coating the said dosage form with the non-functional film coating layer.
  • the process for preparation of the extended release composition comprises (i) sifting minocycline or pharmaceutically acceptable salts thereof and slow dissolving component(s) through a suitable size sieve, (ii) sifting rapid dissolving component(s) and optionally other pharmaceutically acceptable excipient(s) through suitable size sieve, (iii) preparing a binder solution in either aqueous or non-aqueous solvent, (iv) mixing the blend of step (i) with blend of step (ii) in a suitable equipment, (v) granulating the resultant blend with the binder solution of step (iii), (yi) drying the resultant granulates in a suitable drier, (vii) mixing the dried granulates were mixed with previously sifted rapid dissolving and slow dissolving component(s) and optionally other pharmaceutically acceptable excipient(s), (viii) formulating the mixture into a suitable compressed core composition, (ix) optionally forming the non-functional film
  • a preferred process for preparing the extended release formulations of the present invention comprise the steps of:(i) mixing minocycline or pharmaceutically acceptable salt thereof, slow dissolving component(s), rapid dissolving component(s) and optionally other pharmaceutically acceptable excipient(s); (ii) wet granulating the mixed component(s) using binder solution; (iii) drying the granules; (iv) milling the dried granules; (v) blending the mixture with other component including rapid dissolving component(s), slow dissolving component(s); and optionally other pharmaceutically acceptable excipient(s); (vi) compressing the blended mixture to form tablets; and (vii) optionally forming the non- functional film coating on the tablet.
  • the tablets of the present invention are film coated to improve its aesthetic appeal.
  • the film coating material may be selected from group consisting of hydroxypropyl methylcellulose, hydroxypropylcellulose and polyvinyl alcohol.
  • the film coating does not affect the release rate of the minocycline hydrochloride from the composition, since the coating is instant dissolving type, which rapidly dissolves in the stomach.
  • the tablet core is coated using Opadry (Colorcon, Westpoint Pa). According to Colorcon, Opadry ® is a one-step customized coating system that combines polymer, plasticizer, and if desired, a pigment in dry concentrate. Amount of film coating applied on core tablets ranges from about 1 to about 10% by total weight of the pharmaceutical composition, more preferably about 2 to about 5% by total weight of the pharmaceutical composition.
  • the pharmaceutical composition of the minocycline or pharmaceutically acceptable salts thereof may be formulated in a suitable dosage form including granules, beads, pellets, capsules, tablets or pill, and in particular in the form of tablet such as sustained release tablets, controlled release tablets or extended release tablets.
  • a suitable dosage form including granules, beads, pellets, capsules, tablets or pill, and in particular in the form of tablet such as sustained release tablets, controlled release tablets or extended release tablets.
  • the pharmaceutical composition of minocycline hydrochloride in the form of extended release or sustained release tablets.
  • Mixing and granulation can be carried out in a suitable apparatus like rapid mixer granulator (RMG) or fluid bed processor or any other suitable equipment designed for the said purpose. Drying of granules can be carried out using fluid bed processor itself or other drying techniques can be employed such as tray drying, vacuum drying, flash drying etc. Mixing of dried granules with lubricants can be carried out in a suitable mixer like double cone or V-blender or Conta blender. The tableting of lubricated granules can be carried out in a suitable tableting machine equipped with suitable tooling. Coating of tablets can be carried out in a suitable coating apparatus like conventional coating pan or fluid bed processor.
  • RMG rapid mixer granulator
  • fluid bed processor any other suitable equipment designed for the said purpose. Drying of granules can be carried out using fluid bed processor itself or other drying techniques can be employed such as tray drying, vacuum drying, flash drying etc.
  • Mixing of dried granules with lubricants can be carried out in a suitable mixer like
  • the preferred weight of the composition is 50 to 1000 mg, more preferably 75 to 750 mg, most preferably 100 to 500 mg.
  • a method of administering an extended release composition of minocycline hydrochloride for the treatment of acne includes administering the pharmaceutical composition of the minocycline hydrochloride in an effective amount to treat a mammal.
  • the extended release properties of the formulation of the present invention may be demonstrated by observing the in-vitro dissolution rate of the minocycline hydrochloride.
  • the dissolution profile is determined by the rotating basket method in which tablets are immersed in 900 mL of 0.1N HCl for 6 hours at a speed of 100 rpm.
  • the extended pharmaceutical composition of minocycline hydrochloride exhibits a dissolution profile such that atleast about 85% of the minocycline hydrochloride is released within about 4 hours.
  • a dissolution profile is well suited for once a day dosage regimen.
  • Minocycline or pharmaceutically acceptable salts can be prepared as described by Petisi et al, in US Patent Nos. 3,148,212 and 3,226,436; herein incorporated by reference in its entirety.
  • the rapid dissolving component(s) and the slow dissolving component(s) act synergistically to provide an extended release formulation that has dissolution profile and/or bioequivalent properties.
  • composition of the present invention vis-a-vis Solodyn ® (US marketed extended release composition of minocycline from Medicis Laboratories) was performed in 12 healthy volunteers.
  • pharmacokinetic parameters evaluated are AUC, C max and T raax .
  • the ratio of area under the curve for the test product (Example 2 of the present invention) to reference product (Solodyn .135 mg Tablet) is determined to be within the range of 0.8 to 1.25.
  • Tablet is also found to be within the range of 0.8 to 1.25. Compliance of above two criteria testify that the composition of the invention is bioequivalent to Solodyn ® .
  • the pharmaceutical composition of the present invention eliminates the problem of loading dose and also provide extended release of the drug from dosage form in therapeutic range to enable once a day dosage regimen of minocycline or its pharmaceutical acceptable salts. Such a composition further eliminates the vestibular side effects associated with the conventional instant release compositions of minocycline or pharmaceutical salts, solvates, and hydrates.
  • composition of the present invention provide pharmacokinetic parameters, such as, area under the curve (AUC), Cmax etc. comparable with the Solodyn ® from Medicis, the only marketed extended release formulation of minocycline in USA.
  • AUC area under the curve
  • Cmax the only marketed extended release formulation of minocycline in USA.
  • the pharmaceutical composition of the present invention are prepared by using comparatively less amount of sustained release material e.g., hydroxypropyl methylcellulose vis-a-vis marketed formulation (Solodyn ® ), thereby resulting in a low cost product.
  • sustained release material e.g., hydroxypropyl methylcellulose vis-a-vis marketed formulation (Solodyn ® ), thereby resulting in a low cost product.
  • step (d) The powder mass of step (a) was mixed in suitable equipment.
  • step (e) The powder mass of step (b) was mixed in suitable equipment
  • step (f) The powder mass of step (d) was granulated with solution of step (c).
  • step (f) Granules of step (f) were dried in suitable dryer and dried granules were passed through suitable screen.
  • step (h) Dried granules of step (g) were lubricated by mixing with powder mass of step (e).
  • step (d) The powder mass of step (a) was mixed in suitable equipment.
  • step (e) The powder mass of step (b) was mixed in suitable equipment
  • step (f) The powder mass of step (d) was granulated with solution of step (c).
  • step (f) Granules of step (f) were dried in suitable dryer and dried granules were passed through suitable screen.
  • step (h) Dried granules of step (g) were lubricated by mixing with powder mass of step (e).
  • step (d) The powder mass of step (a) was mixed in suitable equipment.
  • step (e) The powder mass of step (b) was mixed in suitable equipment
  • step (f) The powder mass of step (d) was granulated with solution of step (c).
  • step (f) Granules of step (f) were dried in suitable dryer and dried granules were passed through suitable screen.
  • step (h) Dried granules of step (g) were lubricated by mixing with powder mass of step (e).
  • step (c) The powder mass of step (a) was mixed in suitable equipment.
  • step (d) The powder mass of step (b) was mixed in suitable equipment
  • step (e) The powder mass of step (d) was granulated with isopropyl alcohol.
  • step (f) Granules of step (e) were dried in suitable dryer and dried granules were passed through suitable screen.
  • step (g) Dried granules of step (f) were lubricated by mixing with powder mass of step (e).
  • step (h) Lubricated granules of step (g) were compressed into tablets.
  • Example 5 The tablets of the invention were subjected to an in- vitro dissolution method to determine the rate at which the drug Minocycline hydrochloride was released from the tablets.
  • Dissolution method involved USP Type I apparatus at 100 rpm wherein 0.1 HCL was used as dissolution medium at 37 0 C temperature.
  • the dissolution profiles of the formulations of example 1 to 2 were compared with the Solodyn ® 135 mg and the results are summarized in the table 1.
  • Solodyn ® is the commercially available extended release pharmaceutical formulation in the form of tablet meant for once-a-day dosing of minocycline hydrochloride.
  • Dissolution study parameters are as follows: Instrument parameters: USP Type -I, 100 RPM Dissolution parameters: 0.1 N HCL, 900 ml 37°C ⁇ 0.5 0 C Table 1
  • Dissolution method involved USP Type II apparatus at 50 rpm wherein pH- 4.5 acetate buffer was used as dissolution medium at 37 0 C temperature.
  • the dissolution profile of the formulation of example 4 are summarized in the table 2.
  • Dissolution study parameters are as follows: Instrument parameters: USP Type -II, 50 RPM Dissolution parameters: pH 4.5 Acetate buffer, 900 ml 37°C ⁇ 0.5 0 C
  • example 1 In order the assess the stability of drug substance (minocycline hydrochloride) in the drug product or dosage form, extended release pharmaceutical composition of example 1 was subjected to accelerated stability testing at 40°C ⁇ 2°C/75%RH ⁇ 5%RH and observations were made during 3 months in standard HDPE package for amount of drug released, percentage of unreacted minocycline hydrochloride and degraded reaction products. The results were shown in the tablet 3 & 4 given below:
  • This example describes in-vivo study, which measured plasma concentrations of minocycline achieved after oral administration of reference Solodyn ® tablet and test minocycline hydrochloride extended release tablets of example 2.
  • the in-vivo study was carried out on 12 healthy adult subjects under fasting conditions.
  • Plasma minocycline was determined over a 72 hour period, after single oral administration of the respective formulations.
  • Each subject was determined each of the two formulations in cross over design separated by a washout period of atleast 7 days between administrations of the two formulations.
  • Plasma levels are measured at predetermined times utilizing a validated assay method employing LC-MS/MS instrumentation.
  • Plasma pharmacokinetic parameters were evaluated using commercially available software WinNonlin version 5.0.1 or higher.

Abstract

Disclosed herein are extended release pharmaceutical compositions comprising minocycline and pharmaceutically acceptable salts thereof and a process for preparing the composition thereof. The extended release pharmaceutical composition comprises minocycline or pharmaceutically acceptable salt thereof, a rapid dissolving component (s), a slow dissolving component (s) and optionally other pharmaceutically acceptable excipients.

Description

EXTENDED RELEASE PHARMACEUTICAL COMPOSITION OF MINOCYCLINE AND PROCESS THEREOF
Field of the Invention
This invention in general relates to pharmaceutical compositions of minocycline or pharmaceutically acceptable salts thereof. More particularly, the present invention relates to extended release once-a-day pharmaceutical composition of minocycline or pharmaceutically acceptable salts and process for preparing thereof.
Background of the Invention
Minocycline and its non-toxic acid addition salts are widely used as antimicrobial agents and is disclosed in US Patent Nos. 3,148,212 and 3,226,436.
Minocycline hydrochloride, a pharmaceutically acceptable salt has been available in the United States in the form of immediate release oral tablets and capsules containing 50 to 100 mg of the drug. It is typically administered in humans in doses of about 200 mg initially followed by 100 mg every twelve hours; or 200 mg initially followed by 50 mg every six hours. In a typical patient, this results in about a 4.5 mg/kg dose on the first day of treatment, and 3.0 mg/kg/day dose each day thereafter. It has been reported that low doses of minocycline antibiotic show improvement in acne due to the anti-inflammatory activity.
Solodyn® is a currently marketed minocycline hydrochloride extended release dosage form containing 45, 90 & 135 mg of the drug. Inactive ingredients are listed as lactose monohydrate NF, hypromellose type 2910 USP, magnesium stearate NF, colloidal silica NF and carnauba wax NF. The tablets are coated with (colored)
Opadry.
Tetracycline compounds are widely used in therapy primarily for their antimicrobial effect. A preferred family of such agents comprises the 7- or 9- alkylamino-6-deoxy-6-demethyltetracyclines, including the non-toxic acid-addition salts thereof. Commonly assigned Boothe et al, US Pat. No. 3,148,212, and Petisi et al, US Pat. No. 3,226,436, describe the preparation of this family of tetracycline compounds. Although they have achieved widespread use in oral dosage forms, particularly the 7-dimethylamino-6-deoxy-6-demethyltetracycline hydrochloride, also known as minocycline hydrochloride, they have one drawback, and that is a tendency to cause CNS and gastrointestinal side effects including lightheadedness, dizziness, vertigo, nausea, vomiting and diarrhea. People on oral therapy with these drags must, as a result, be cautioned about driving vehicles or using hazardous machinery.
US Patent No 5,283,065 assigned to American Cynamid, discloses a controlled release pharmaceutical composition in oral tablet dosage form comprising two types of granules, active granules and compressible granules. The active granules include the active ingredient blended with a diluent and the compressible granules include a mono or disaccharide in a diffusible matrix. The compressible granules distort and fill voids to provide a cushion to prevent the active granules from breaking through during tableting process. This protects any loss of controlled release properties.
US Patent No 5,413,777 assigned to American Cynamid, discloses a pulsatile once a day delivery system which maintains therapeutic blood level concentrations of minocycline in a patient for twenty-four hours. The dosage form comprises an initial loading or first pulse of minocycline powder or minocycline containing coated or uncoated quick release granules. It also includes a second loading or second pulse of minocycline containing pH sensitive coated spherical granules, administered either simultaneously or separately up to about 120 minutes apart.
PCT Publication No. 2007/001961 assigned to Medicis, discloses preparation of once-a-day formulation of minocycline hydrochloride used for the treatment of acne vulgaris. This application teaches range of fast dissolving carrier to slow dissolving carrier and concentration of hydroxypropyl methylcellulose (23 to 27% by wt of tablet).
PCT Publication No. 2004/078111 assigned to Ranbaxy, relates to extended release pharmaceutical composition of minocycline or pharmaceutically acceptable salts thereof. This application discloses preparation of matrix tablets of minocycline hydrochloride having two or more hydrophilic polymers.
In the light of the above background, it will be appreciated by those versed in the pharmaceutical arts that there exists a need for an alternative extended release pharmaceutical compositions that can deliver minocycline on once-a-day basis. Further, the composition must be formulated by a simple manufacturing method for large scale production and still, achieve the desired dissolution profile for being bioequivalent to the reference-listed drug (Solodyn®). Objects and Summary of the Invention
It is a principal object of the present invention to provide an extended release pharmaceutical composition comprising minocycline or pharmaceutically acceptable salts thereof. It is another object of the present invention to provide a once a day pharmaceutical composition of minocycline, wherein the composition exhibits predetermined release of the drug from the dosage form or composition or formulation in a therapeutic effective amount throughout the day without any loading dose. It is yet another object of the present invention to provide a process for large scale manufacturing of an extended release pharmaceutical composition comprising minocycline or pharmaceutically acceptable salts thereof.
It is still another object of the present invention to provide a simple, reproducible, economical process for large scale manufacture of extended release formulation comprising minocycline using conventional equipment.
It is yet another object of the present invention to provide an extended release pharmaceutical composition of minocycline or pharmaceutically acceptable salts thereof wherein the pharmaceutical composition is bioequivalent to Solodyn® (reference listed product). The above and other objects of the present invention are achieved by employing the following preferred embodiments. The following embodiments further describe the present invention, however, the disclosed invention is not restricted to any particular embodiments herein after described and extends to cover the modifications obvious to one of ordinary skilled in the art. In accordance with a preferred embodiment of the present invention, there is provided an extended release pharmaceutical composition comprising minocycline or pharmaceutically acceptable salt thereof, a rapid dissolving component (s) and a slow dissolving component (s), wherein weight ratio of rapid dissolving component(s) to slow dissolving component(s) is from about 0.8 to about 1.2. In accordance with another embodiment of the present invention, wherein the minocycline or pharmaceutically acceptable salt in the extended release pharmaceutical composition is present in an amount of about 0.1 to about 50% of total weight of the composition. In accordance with still another embodiment of the present invention, said slow dissolving component in the extended release pharmaceutical composition is present in an amount of about 10 to about 22% of total weight of the composition.
In accordance with yet another embodiment of the present invention, said weight ratio of the rapid dissolving component to the slow dissolving component in the extended release pharmaceutical composition is from about 0.9 to about 1.1.
In accordance with still one another embodiment of the present invention said rapid dissolving component is lactose.
In accordance with yet one another embodiment of the present invention, the slow dissolving component is hydroxypropyl methylcellulose.
In accordance with still another embodiment of the present invention the weight ratio of rapid dissolving component(s) to slow dissolving component(s) in the extended release pharmaceutical composition is the ratio of extragranular rapid dissolving component to the slow dissolving component in the pharmaceutical composition.
In accordance with yet another embodiment of the present invention, there is provided a process for manufacturing the extended release pharmaceutical composition comprising minocycline or pharmaceutically acceptable salts thereof wherein the process comprising dry mixing minocycline or pharmaceutically acceptable salts, slow dissolving component(s), rapid dissolving component(s) and optionally other pharmaceutical acceptable excipients, granulating the resultant blend using binder solution and drying the resultant granulates; subsequently mixing the dried granulates with rapid dissolving component(s), slow dissolving component(s) and optionally other pharmaceutically acceptable excipients, formulating the mixture into a suitable dosage form and further coating the said dosage form with a nonfunctional film coating layer.
These and other embodiments of the invention, as well as additional inventive features, will be apparent from the description of the invention provided herein.
Description of the Invention The particulars shown herein are by way of example and for purposes of illustrative discussion of the various embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the invention. In this regard, no attempt is made to show details of the invention in more detail than is necessary for a fundamental understanding of the invention, the description making apparent to those skilled in the art how the several forms of the invention may be embodied in practice. The present invention relates to an extended release pharmaceutical composition comprising minocycline or pharmaceutically acceptable salts thereof to provide once a day dosage composition without any loading dose and a process for preparing the same.
The term 'pharmaceutically acceptable salts of minocycline' includes salts that are pharmaceutically and therapeutically acceptable. Such salts are typically prepared from inorganic acids or bases and/or organic acids or bases. Examples of such acid and bases are well known to those of ordinary skilled in the art. The invention, in particular, contemplates the use of minocycline hydrochloride salt, although the use of other pharmaceutically acceptable salts is within the scope of the invention. "Extended release pharmaceutical composition" or formulations which exhibit an "extended release" of the minocycline salt as used herein is defined to mean pharmaceutical composition administered once-a-day that provide a release of the minocycline salt in a manner which is sufficient to provide and maintain therapeutic concentration of minocycline for 24 .hours following its administration. The term "bioequivalent" as used herein has its ordinary meaning as understood by those skilled in the art and thus includes, without limitation, a drug or dosage form that, upon administration to a suitable patient population, provides principle pharmacokinetic parameters, e.g., AUC and Cmax, that are in the range of 80% to 125% of those provided by a reference standard. The term "tablet" as used herein includes tablets of any shape and includes caplets, which are tablets having a capsule shape.
"Non-functional coatings" are coatings that do not affect drug release, but which affect other properties, such as enhancement of the chemical, biological or physical characteristics, or the enhancement of the aesthetic appeal of the pharmaceutical composition.
Acne is a common disease characterized by various types of lesions. The areas affected typically are areas of the skin where sebaceous glands are largest, most numerous, and most active. The lesions associated with acne are usually categorized as a non-inflammatory. Non inflammatory lesions include comedones. Comedones appear in two forms, open and closed. Comedones are thought to arise from abnormal follicular differentiation. Compositions of the present invention are useful for the treatment of above mentioned and other types of acne. The term "about" when used as a modifier for, or in conjunction with, a variable, is intended to convey that the numbers and ranges disclosed herein are flexible and that practice of the present invention by those skilled in the art using concentrations, amounts, contents and properties that are outside of the range or different from a single value, will achieve desired results, namely extended release pharmaceutical composition of minocycline or pharmaceutically acceptable salts thereof and process for preparing and using such compositions.
The term Cmax as used herein means the maximum plasma/blood minocycline concentration achieved after oral administration of the extended pharmaceutical compositions of minocycline. The term AUC (area under the curve) as used herein indicates the total amount of minocycline absorbed by the bloodstream in a predetermined time, generally 24 hours. AUC is a measure of bioavailability, which is calculated by integrating plasma concentrations levels of minocycline with respect to time.
According to the present invention, the term 'composition' is used synonymously with the term 'formulation' and 'dosage form'.
Weight percentages as expressed herein, are relative to the total core tablet weight, excluding the weight of any coating, unless otherwise specified.
According to the present invention an extended release pharmaceutical composition comprises minocycline or pharmaceutically acceptable salts thereof, wherein the formulation provides a therapeutic effective amount of minocycline such that the dosage form is administrable to a subject on once a day basis without any loading dose. The pharmaceutical composition thus provides therapeutic concentrations of minocycline for extended periods of time.
According to the present invention the extended release pharmaceutical composition comprises a functional core, said functional core comprising minocycline or pharmaceutically acceptable salts thereof, sustained release material(s) and other pharmaceutically acceptable excipients. Additionally, in accordance with the present invention the pharmaceutical composition comprises minocycline or pharmaceutically acceptable salts thereof, sustained release material(s), predominantly hydrophilic or hydrophobic polymers and other pharmaceutically acceptable excipients wherein said sustained release material is one of the major constituent of the slow dissolving component.
In accordance with the present invention, the extended release pharmaceutical composition comprises a) minocycline or pharmaceutically acceptable salts thereof; : b) rapid dissolving component(s); and c) slow dissolving component(s); wherein weight ratio of said rapid dissolving component(s) to said slow dissolving component(s) is from about 0.8 to about 1.2
Preferably in accordance with the present invention, the weight ratio of said rapid dissolving component(s) to said slow dissolving component(s) is from about 0.9 to about 1.1.
The pharmaceutical compositions of minocycline or pharmaceutically acceptable salts according to the present invention encompass certain ratio of rapid- dissolving component and slow-dissolving component (i e., about 0.8 to about 1.2) which are critical for obtaining desired dissolution profile to achieve once-a-day composition and for achieving bioequivalence to the reference listed drug (Solodyn®).
The artisan will appreciate that the desired in-vitro release rate described herein for minocycline or pharmaceutically acceptable salts is achieved by controlling the release of drug from the core matrix. The weight ratio of rapid dissolving component(s) to slow dissolving component(s) is from about 0.8 to about 1.2, preferably from about 0.9 to about 1.1. Preferably according to the invention, the cited ratio of rapid dissolving component(s) to slow dissolving component(s) is the ratio of extragranular rapid dissolving component to slow dissolving component.
The rapid dissolving component is any water soluble excipient including filler that rapidly dissolves in an aqueous physiological medium, such as gastric fluid, thereby tending to rapidly release the active ingredient. Water soluble filler includes sugar and sugar alcohols, inorganic salts or any combination thereof. Examples include sorbitol, mannitol, xylitol, inositol, lactose, fructose, sucrose, dextrose, lactitol, confectioner's sugar, potassium chloride, sodium chloride, sodium carbonate, sodium bicarbonate or any combination thereof and the like.
The preferred rapid dissolving component for the composition of the present invention is lactose which is commercially available as Pharmatose 200 M from DMV-Fonterra, UK. Rapid dissolving component may either be used intragranularly or extragranularly or both intragranularly and extragranularly. For the purpose of this invention, while calculating the weight ratios of rapid dissolving component(s) to slow dissolving component(s), rapid dissolving component used extragranularly is considered in calculations. The amount of rapid dissolving component(s) may vary in the pharmaceutical composition of the present invention and it may be used in an amount of about 20 to about 70% by total weight of the core composition, preferably about 25 to about 60% and more preferably of about 30 to about 50%.
In accordance with the present invention, the slow dissolving component broadly includes materials that slow down the release of the drug from the matrix. Slow dissolving components includes cellulosic polymers such as hydroxypropyl methylcellulose, hydroxypropylcellulose (e.g., KLUCEL® HXF, KLUCEL® EF) , cellulose acetate, ethyl cellulose or the like; gums such as guar gum, locust bean gum, xanthan gum, karaya gum or the like; oils or waxes such as hydrogenated vegetable oil, polyethylene glycol, or the like; neutral copolymer based on ethylacrylate and methylmethacrylate (available under brand name EUDRAGIT® NE 30D); copolymer of acrylic acid and methacrylic acid esters with quaternary ammonium compounds (available under brand name Eudragit RL & RS); others such as polyvinylpyrrolidone, carbomers, polyvinyl acetate, polyethylene oxide and the like; lipid based tableting agents such as magnesium stearate, calcium stearate, glyceryl behenate and the like or any combination thereof. Outer coatings are excluded in the calculation of ratio of rapid dissolving component to slow dissolving component. Hydroxypropyl methylcellulose is the preferred choice of slow dissolving component. Hydroxypropyl methylcellulose used in the present invention is available in different viscosity grades such as those available under the brand name METHOCEL® available. Both intragranular and/or extragranular, slow dissolving component(s) are considered while calculating the weight ratio of rapid dissolving component(s) to slow dissolving component(s). The amount of the slow dissolving component(s) in the pharmaceutical composition according to the present invention generally varies from about 10 to about 22% by total weight of the composition, preferably from about 15 to about 22% and still more preferably from about 18 to about 22%. In accordance with the present invention the extended release pharmaceutical composition comprises about 0.1 to about 50% w/w of the minocycline or pharmaceutically acceptable salts, about 10 to about 22% w/w of the slow dissolving component, about 20 to about 70%w/w of the rapid dissolving component and optionally other pharmaceutically acceptable excipients. According to the present invention, both intragranular and/or extragranular, slow dissolving component(s) are considered while calculating the weight ratio of rapid dissolving component(s) to slow dissolving component(s) while for rapid dissolving component(s), only extragranular rapid dissolving component is considered for calculating said weight ratios. Further according to the present invention, the release rate of the minocycline or pharmaceutically acceptable salts is controlled not only by incorporating suitable amount of slow dissolving component but also by specific weight ratio of rapid dissolving component(s) to slow dissolving component(s). The present weight ratio of 0.8 to 1.2 is critical for desired in vitro dissolution profile and in-vivo bioavailability of drugs.
The extended release composition in accordance with the invention comprises an intragranular rapid dissolving component, an extragranular rapid dissolving component, and a slow dissolving component, wherein said intragranular rapid dissolving component is completely or partially encapsulated or included or coated in said slow dissolving component, wherein said extragranular rapid dissolving component and said slow dissolving component are at a weight ratio of about 0.8 to about 1.2, preferably about 0.9 to about 1.1.
Besides minocycline or pharmaceutically acceptable salts, rapid-dissolving component(s) and slow-dissolving component(s), the compositions of the present invention further comprises one or more pharmaceutically acceptable excipients, that assist in functionality and processing of formulation such as binders, disintegrants, lubricants, glidants, coloring agents, surfactants or flavors and the like. The examples of such typical excipients and their concentrations are known to the person skilled in the art.
Lubricants, which may be used in the composition of the present invention, include, but are not limited to, magnesium stearates, sodium stearates, calcium stearates, stearic acid, pregelatinised starch, sodium stearyl fumarate, sucrose esters of fatty acid, glyceryl behenate, polyethylene glycol, glyceryl monostearate or combination thereof. Lubricants may be present in the composition of the present invention in an amount of from about 0.2 to about 10% by the total weight of the composition, preferably from about 0.5 to about 5% by the total weight of the composition. Preferred lubricants are magnesium stearates and /or pregelatinised starch. In the present invention, metallic stearates serves dual role in the pharmaceutical composition including slow dissolving component and lubricant.
Glidants or antiadherants, which may be employed as part of the composition of the present invention, include, but are not limited to, talc, corn starch, colloidal silicon dioxide or combination thereof and other glidants well known to those skilled in the art. Preferred glidant is colloidal silicon dioxide available under the brand name Aerosil® 200. Glidants may be used in the composition of the present invention in an amount of from about 0.2 to about 10% by the total weight of the composition, preferably from about 0.5 to about 5% by the total weight of the composition. The optional disintegrant for the composition of the present invention can be selected from the group comprising of sodium starch glycolate, crosslinked polyvinyl pyrrolidone, croscarmellose sodium and low-substituted hydroxypropyl cellulose or combination thereof and the like. Preferred disintegrants are croscarmellose sodium and crosslinked polyvinyl pyrrolidone (Polyplasdone-XL). The disintegrant is used in an amount of less than 10% by the total weight of the composition.
Suitable coloring or flavoring agents include those approved for use by the United States Food and Drug Administration (FDA) and are well known to those skilled in the art.
The granulating liquid used in the present invention includes aqueous or non aqueous solvents to dissolve or disperse the binder to prepare a binder solution. Examples of such solvents include water and isopropyl alcohol. These solvent may either be used alone or in combination with different ratios such as 90:10 (IPA: Water) and 80:20 (IPA: Water) in order to ensure better granulation characteristics. Solvents used in the present invention are environment friendly and poses no occupational hazards to the workers.
Embodiments of the extended release pharmaceutical composition may include one or more of the following features. In an exemplary process, the slow dissolving component includes sustained release material and constitutes from about 10 to about 22% w/w of the composition.
According to the present invention, the release of minocycline hydrochloride from composition is modulated by sagacious selection of the rapid dissolving component(s), slow dissolving component(s) and their weight ratio(s). Patent application US 20060293290 teaches that amount of slow dissolving component i.e., hydroxypropyl methylcellulose for 45, 90 & 135 mg minocycline strength ranges from 23.5 to 28% by weight of the total tablet. In the composition of the present invention, amount of sustained release material (i.e. Hydroxypropyl methylcellulose) is about 10 to about 22% by weight of the total tablet, it implicates present invention uses less amount of polymer thereby yields cost effective extended release composition of minocycline hydrochloride.
In an embodiment, extended release composition of the present invention contains minocycline or pharmaceutically acceptable salts in therapeutically effective amount and hydroxypropyl methylcellulose in the range of about 10 to about 22%, preferably about 15 to about 22%, more preferably about 18 to about 22% by the weight of the core composition.
In a preferred embodiment, extended release composition of the present invention contains minocycline or pharmaceutically acceptable salts in therapeutically effective amount and about 20% of hydroxypropyl methylcellulose by weight of the core composition.
According to an exemplary embodiment the invention the extended release pharmaceutical composition of minocycline hydrochloride comprises (i) an intragranular blend of: 97.18 mg of minocycline hydrochloride (90 mg of minocycline hydrochloride free base equivalent), 60 mg of hydroxypropyl methylcellulose; and 73.18 mg of an intragranular lactose, wherein hydroxypropyl methylcellulose is slow dissolving component; (ii) 63.64 mg of extragranular lactose wherein extragranular lactose is a rapid dissolving component, (iii) 2 mg of silicon dioxide; and (iv) 4 mg of magnesium stearate as one of slow dissolving component. Alternatively according to another exemplary embodiment of the invention the extended release pharmaceutical composition of minocycline hydrochloride comprises (i) an intragranular blend of: 145.77 mg of minocycline hydrochloride (135 mg of minocycline hydrochloride free base equivalent), 90 mg of hydroxypropyl methylcellulose; and 109.77 mg of an intragranular lactose, wherein hydroxypropyl methylcellulose is slow dissolving component; (ii) 95.46 mg of extragranular lactose wherein extragranular lactose is a rapid dissolving component, (iii) 3 mg of silicon dioxide; and (iv) 6 mg of magnesium stearate as one of slow dissolving component.
According to still another exemplary embodiment of the invention the extended release pharmaceutical composition of minocycline hydrochloride comprises (i) an intragranular blend of; 48.59 mg of minocycline hydrochloride (45 mg of minocycline hydrochloride free base equivalent), 30 mg of hydroxypropyl methylcellulose; and 36.59 mg of an intragranular lactose, wherein hydroxypropyl methylcellulose is slow dissolving component; (ii) 31.82 mg of extragranular lactose wherein extragranular lactose is a rapid dissolving component, (iii) 1 mg of silicon dioxide; and (iv) 2 mg of magnesium stearate as one of slow dissolving component.
In accordance with the present invention a process for preparing an extended release pharmaceutical composition includes a mixture of minocycline or pharmaceutically acceptable salt thereof and sustained release material, wherein the process includes (a) preparing the functional core, and (b) optionally, forming the film coating on the core.
According to the present invention a process for preparing an extended release pharmaceutical composition comprising minocycline or pharmaceutically acceptable salt thereof, rapid dissolving component(s) and slow dissolving component(s), wherein in said composition contains the weight ratio of rapid dissolving component(s) to slow dissolving component(s) is from about 0.8 to about 1.2, preferably from about 0.9 to about 1.1.
Furthermore, according to the present invention the extended release pharmaceutical composition comprises a functional core of minocycline or pharmaceutically acceptable salt thereof, rapid dissolving component(s), slow dissolving component(s) and one or more pharmaceutically acceptable excipients, and non-functional film coating applied over the functional core wherein in said core contains the weight ratio of rapid dissolving component(s) to slow dissolving component(s) is from about 0.8 to about 1.2.
Alternatively according to the present invention the extended release pharmaceutical composition comprises functional core of minocycline or pharmaceutically acceptable salt thereof, rapid dissolving component(s), slow dissolving component(s) and one or more pharmaceutically acceptable excipients, and non-functional film coating applied over the functional core wherein the amount of slow dissolving component(s) is about 10 to about 22% by the total weight of the core composition. The present invention also provides for the process for manufacturing such compositions.
According to the present invention, the pharmaceutical compositions of the present invention are dispensed in form of extended release tablets. The extended release tablets may be optionally film coated but film coating in no way modulates the release of drug from the core of tablets. Modulation of extended release of drug from said tablets is effected by type and concentration of the sustained release material, in conjunction with the weight ratio of rapid dissolving component to slow dissolving component present in the core tablets.
The pharmaceutical composition of the present invention can be prepared by scale up or scale down procedure. Thus preparation of a single blend is sufficient for the production of all the three strengths (i.e., 45 mg, 90 mg & 135 mg of minocycline hydrochloride) and also such type of strategy does not affect the concentrations as well as the ratio of various excipients in the final composition. In addition, the process also eliminates the confusion associated with the look-alike marketed extended release compositions of minocycline hydrochloride (Solodyn®). The present composition is easy to scale up and produced on commercial scale.
In accordance with the present invention, the extended release pharmaceutical • composition is preferably prepared by wet granulation technique while other techniques of manufacturing such as fluid bed processing, dry granulation, direct compression or any other manufacturing technique known in the art, are also within the scope of the present invention. The tablet may further be coated, which may comprise a non-functional or a functional polymer.
In accordance with the present invention, the process for preparation of extended release pharmaceutical composition of minocycline or pharmaceutically acceptable salts thereof comprises (i) dry mixing minocycline or pharmaceutically acceptable salts, slow dissolving component(s), rapid dissolving component(s) and optionally other pharmaceutical acceptable excipients, (ii) granulating the resultant blend with using binder solution and drying the resultant granulates; (iii) mixing the dried granulates with rapid dissolving component(s), slow dissolving component(s) and optionally other pharmaceutically acceptable excipients, (iv) formulating the mixture into suitable dosage form such as tablets; and finally (iv) coating the said dosage form with the non-functional film coating layer.
Alternatively according to the present invention, the process for preparation of the extended release composition comprises (i) sifting minocycline or pharmaceutically acceptable salts thereof and slow dissolving component(s) through a suitable size sieve, (ii) sifting rapid dissolving component(s) and optionally other pharmaceutically acceptable excipient(s) through suitable size sieve, (iii) preparing a binder solution in either aqueous or non-aqueous solvent, (iv) mixing the blend of step (i) with blend of step (ii) in a suitable equipment, (v) granulating the resultant blend with the binder solution of step (iii), (yi) drying the resultant granulates in a suitable drier, (vii) mixing the dried granulates were mixed with previously sifted rapid dissolving and slow dissolving component(s) and optionally other pharmaceutically acceptable excipient(s), (viii) formulating the mixture into a suitable compressed core composition, (ix) optionally forming the non-functional film coating on the compressed core and (x) packing the resultant product in suitable packages like HDPE bottles or blister packs.
According to a preferred process for preparing the extended release formulations of the present invention comprise the steps of:(i) mixing minocycline or pharmaceutically acceptable salt thereof, slow dissolving component(s), rapid dissolving component(s) and optionally other pharmaceutically acceptable excipient(s); (ii) wet granulating the mixed component(s) using binder solution; (iii) drying the granules; (iv) milling the dried granules; (v) blending the mixture with other component including rapid dissolving component(s), slow dissolving component(s); and optionally other pharmaceutically acceptable excipient(s); (vi) compressing the blended mixture to form tablets; and (vii) optionally forming the non- functional film coating on the tablet. The tablets of the present invention are film coated to improve its aesthetic appeal. The film coating material may be selected from group consisting of hydroxypropyl methylcellulose, hydroxypropylcellulose and polyvinyl alcohol. The film coating does not affect the release rate of the minocycline hydrochloride from the composition, since the coating is instant dissolving type, which rapidly dissolves in the stomach. In one embodiment, the tablet core is coated using Opadry (Colorcon, Westpoint Pa). According to Colorcon, Opadry® is a one-step customized coating system that combines polymer, plasticizer, and if desired, a pigment in dry concentrate. Amount of film coating applied on core tablets ranges from about 1 to about 10% by total weight of the pharmaceutical composition, more preferably about 2 to about 5% by total weight of the pharmaceutical composition.
In accordance with the present invention, the pharmaceutical composition of the minocycline or pharmaceutically acceptable salts thereof may be formulated in a suitable dosage form including granules, beads, pellets, capsules, tablets or pill, and in particular in the form of tablet such as sustained release tablets, controlled release tablets or extended release tablets. Preferably, the pharmaceutical composition of minocycline hydrochloride in the form of extended release or sustained release tablets.
Mixing and granulation can be carried out in a suitable apparatus like rapid mixer granulator (RMG) or fluid bed processor or any other suitable equipment designed for the said purpose. Drying of granules can be carried out using fluid bed processor itself or other drying techniques can be employed such as tray drying, vacuum drying, flash drying etc. Mixing of dried granules with lubricants can be carried out in a suitable mixer like double cone or V-blender or Conta blender. The tableting of lubricated granules can be carried out in a suitable tableting machine equipped with suitable tooling. Coating of tablets can be carried out in a suitable coating apparatus like conventional coating pan or fluid bed processor.
The preferred weight of the composition is 50 to 1000 mg, more preferably 75 to 750 mg, most preferably 100 to 500 mg. In accordance with the present invention, a method of administering an extended release composition of minocycline hydrochloride for the treatment of acne is provided. The method includes administering the pharmaceutical composition of the minocycline hydrochloride in an effective amount to treat a mammal. The extended release properties of the formulation of the present invention may be demonstrated by observing the in-vitro dissolution rate of the minocycline hydrochloride. In a particular example, the dissolution profile is determined by the rotating basket method in which tablets are immersed in 900 mL of 0.1N HCl for 6 hours at a speed of 100 rpm.
In accordance with another embodiment of the present invention, the extended pharmaceutical composition of minocycline hydrochloride exhibits a dissolution profile such that atleast about 85% of the minocycline hydrochloride is released within about 4 hours. Such a dissolution profile is well suited for once a day dosage regimen.
The materials for the present invention can be purchased or prepared by a variety of procedures well known to those of ordinary skill in the art. Minocycline or pharmaceutically acceptable salts can be prepared as described by Petisi et al, in US Patent Nos. 3,148,212 and 3,226,436; herein incorporated by reference in its entirety. To obtain a product that is bioequivalent to Solodyn®, the rapid dissolving component(s) and the slow dissolving component(s) act synergistically to provide an extended release formulation that has dissolution profile and/or bioequivalent properties.
Studies for evaluating the pharmacokinetic parameters of composition of the present invention vis-a-vis Solodyn® (US marketed extended release composition of minocycline from Medicis Laboratories) was performed in 12 healthy volunteers.
Various pharmacokinetic parameters evaluated are AUC, Cmax and Traax. The ratio of area under the curve for the test product (Example 2 of the present invention) to reference product (Solodyn .135 mg Tablet) is determined to be within the range of 0.8 to 1.25. The ratio of peak plasma concentration of minocycline from the test product (Example 2 of the present invention) to reference product (Solodyn®.135 mg
Tablet) is also found to be within the range of 0.8 to 1.25. Compliance of above two criteria testify that the composition of the invention is bioequivalent to Solodyn®.
Being bioequivalent means the rate and extent of absorption of minocycline from the two dosage forms are same.
The pharmaceutical composition of the present invention eliminates the problem of loading dose and also provide extended release of the drug from dosage form in therapeutic range to enable once a day dosage regimen of minocycline or its pharmaceutical acceptable salts. Such a composition further eliminates the vestibular side effects associated with the conventional instant release compositions of minocycline or pharmaceutical salts, solvates, and hydrates.
Furthermore, the pharmaceutical composition of the present invention provide pharmacokinetic parameters, such as, area under the curve (AUC), Cmax etc. comparable with the Solodyn® from Medicis, the only marketed extended release formulation of minocycline in USA.
The pharmaceutical composition of the present invention are prepared by using comparatively less amount of sustained release material e.g., hydroxypropyl methylcellulose vis-a-vis marketed formulation (Solodyn®), thereby resulting in a low cost product.
Without further elaboration, it is believed that one skilled in the art can, using the preceding description, practice the present invention to its fullest extent. The following detailed examples describe how to prepare the various solid dosage forms and/or perform the various processes of the invention and are to be construed as merely illustrative, and not limitations of the preceding disclosure in any way whatsoever. Those skilled in the art will promptly recognize appropriate variations from the procedures both as to ingredients of the solid dosage forms and the process of making same Example 1
Extended release tablets of Minocycline
Figure imgf000018_0001
Figure imgf000019_0001
Manufacturing process:
(A) Core Preparation:
(a) Minocycline hydrochloride, hydroxypropyl methylcellulose and lactose were sifted through suitable screen. (b) Colloidal silicon dioxide, magnesium stearate and lactose were sifted through suitable screen.
(c) Solution of hydroxypropyl methylcellulose was prepared in mixture of Isopropyl alcohol and purified water
(d) The powder mass of step (a) was mixed in suitable equipment. (e) The powder mass of step (b) was mixed in suitable equipment
(f) The powder mass of step (d) was granulated with solution of step (c).
(g) Granules of step (f) were dried in suitable dryer and dried granules were passed through suitable screen.
(h) Dried granules of step (g) were lubricated by mixing with powder mass of step (e). (i) Lubricated granules of step (h) were compressed into tablets.
(B) Film Coating
(i) Core tablets as obtained in step (i) were coated with the film coating composition as mentioned above until 3 percent target buildup was achieved.
Example 2 Extended release tablets of Minocycline
Figure imgf000019_0002
Figure imgf000020_0001
Manufacturing process: (A) Core Preparation:
(a) Minocycline hydrochloride, hydroxypropyl methylcellulose and lactose were sifted through suitable screen. (b) Colloidal silicon dioxide, magnesium stearate and lactose were sifted through suitable screen.
(c) Solution of hydroxypropyl methylcellulose was prepared in mixture of Isopropyl alcohol and purified water
(d) The powder mass of step (a) was mixed in suitable equipment. (e) The powder mass of step (b) was mixed in suitable equipment
(f) The powder mass of step (d) was granulated with solution of step (c).
(g) Granules of step (f) were dried in suitable dryer and dried granules were passed through suitable screen.
(h) Dried granules of step (g) were lubricated by mixing with powder mass of step (e). (i) Lubricated granules of step (h) were compressed into tablets.
(B)FiIm Coating
(j)Core tablets as obtained in step (i) were coated with the film coating composition as mentioned above until 3 percent target buildup was achieved.
Example 3 Extended release tablets of Minocycline
Figure imgf000020_0002
Figure imgf000021_0001
Manufacturing process: (A)Core Preparation:
(a) Minocycline hydrochloride, hydroxypropyl methylcellulose and lactose were sifted through suitable screen.
(b) Colloidal silicon dioxide, magnesium stearate and lactose were sifted through suitable screen.
(c) Solution of hydroxypropylcellulose was prepared in Isopropyl alcohol
(d) The powder mass of step (a) was mixed in suitable equipment.
(e) The powder mass of step (b) was mixed in suitable equipment
(f) The powder mass of step (d) was granulated with solution of step (c).
(g) Granules of step (f) were dried in suitable dryer and dried granules were passed through suitable screen.
(h) Dried granules of step (g) were lubricated by mixing with powder mass of step (e). (i) Lubricated granules of step (h) were compressed into tablets.
Example 4 Extended release tablets of Minocycline
Figure imgf000021_0002
Figure imgf000022_0001
Manufacturing process: (A)Core Preparation:
(a) Minocycline hydrochloride, hydroxypropyl methylcellulose and lactose were sifted through suitable screen. (b) Colloidal silicon dioxide, magnesium stearate and lactose were sifted through suitable screen.
(c) The powder mass of step (a) was mixed in suitable equipment.
(d) The powder mass of step (b) was mixed in suitable equipment
(e) The powder mass of step (d) was granulated with isopropyl alcohol. (f) Granules of step (e) were dried in suitable dryer and dried granules were passed through suitable screen.
(g) Dried granules of step (f) were lubricated by mixing with powder mass of step (e). (h) Lubricated granules of step (g) were compressed into tablets.
Example 5 The tablets of the invention were subjected to an in- vitro dissolution method to determine the rate at which the drug Minocycline hydrochloride was released from the tablets. Dissolution method involved USP Type I apparatus at 100 rpm wherein 0.1 HCL was used as dissolution medium at 370C temperature. The dissolution profiles of the formulations of example 1 to 2 were compared with the Solodyn® 135 mg and the results are summarized in the table 1. Solodyn® is the commercially available extended release pharmaceutical formulation in the form of tablet meant for once-a-day dosing of minocycline hydrochloride. Dissolution study parameters are as follows: Instrument parameters: USP Type -I, 100 RPM Dissolution parameters: 0.1 N HCL, 900 ml 37°C±0.50C Table 1
Figure imgf000023_0001
Example 6
The tablets of the invention were subjected to an in- vitro dissolution method to determine the rate at which the drug minocycline hydrochloride was released from the tablets. Dissolution method involved USP Type II apparatus at 50 rpm wherein pH- 4.5 acetate buffer was used as dissolution medium at 370C temperature. The dissolution profile of the formulation of example 4 are summarized in the table 2. Dissolution study parameters are as follows: Instrument parameters: USP Type -II, 50 RPM Dissolution parameters: pH 4.5 Acetate buffer, 900 ml 37°C±0.50C
Table 2
Figure imgf000023_0002
Example 7
In order the assess the stability of drug substance (minocycline hydrochloride) in the drug product or dosage form, extended release pharmaceutical composition of example 1 was subjected to accelerated stability testing at 40°C±2°C/75%RH±5%RH and observations were made during 3 months in standard HDPE package for amount of drug released, percentage of unreacted minocycline hydrochloride and degraded reaction products. The results were shown in the tablet 3 & 4 given below:
Table 3
Figure imgf000024_0001
Table 4
Figure imgf000024_0002
Example 8
This example demonstrates that the formulation of example 2 (labeled amount
135 mg of minocycline) is bioequivalent to solely marketed formulation Solodyn®
(labeled amount 135 mg of minocycline) when administered to healthy human volunteer under fasting conditions as testified by the area under the curve (AUC) and
Crnax-
This example describes in-vivo study, which measured plasma concentrations of minocycline achieved after oral administration of reference Solodyn® tablet and test minocycline hydrochloride extended release tablets of example 2. The in-vivo study was carried out on 12 healthy adult subjects under fasting conditions. Plasma minocycline was determined over a 72 hour period, after single oral administration of the respective formulations. Each subject was determined each of the two formulations in cross over design separated by a washout period of atleast 7 days between administrations of the two formulations. Plasma levels are measured at predetermined times utilizing a validated assay method employing LC-MS/MS instrumentation. Plasma pharmacokinetic parameters were evaluated using commercially available software WinNonlin version 5.0.1 or higher. The statistical analysis was performed using SAS® package (SAS® Institute Inc., USA version 9.1 or higher). Values derived at each time point and to determine area under the curve (AUC) and maximum concentration (Cmax) afforded by the Solodyn® and the test formulation. The test formulation provided bioavailability of minocycline, which is substantially equivalent to that of Solodyn®, as determined by the software program. Pharmacokinetic parameters of both reference and test formulations have been shown in table 5 below:
Table 5
Figure imgf000025_0001
While this invention has been described with an emphasis upon preferred embodiments, it will be obvious to those of ordinary skill in the art that variations in the preferred methods of the present invention may be used and that it is intended that the invention may be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications encompassed within the spirit and scope of the invention as defined by the following claims.

Claims

We claim:
1. An extended release pharmaceutical composition comprising: a. minocycline or pharmaceutically acceptable salt thereof; b. a rapid dissolving component (s); and c. a slow dissolving component (s). wherein weight ratio of rapid dissolving component(s) to slow dissolving component(s) is from about 0.8 to about 1.2.
2. The extended release pharmaceutical composition according to claim 1 , wherein said pharmaceutically acceptable salt is a hydrochloride salt.
3. The extended release pharmaceutical composition according to claim
1, wherein said minocycline or pharmaceutically acceptable salt is present in an amount of about 0.1 to about 50% of total weight of the composition.
4. The extended release pharmaceutical composition according to claim 1, wherein said slow dissolving component is present in an amount of about 10 to about 22% of total weight of the composition.
5. The extended release pharmaceutical composition according to claim 4, wherein said slow dissolving component is preferably present in an amount of about 15 to about 22% of total weight of the composition.
6. The extended release pharmaceutical composition according to claim 1 , wherein said weight ratio of the rapid dissolving component to the slow dissolving component is from about 0.9 to about 1.1.
7. The extended release pharmaceutical composition according to claim 1, wherein the pharmaceutical composition further comprising lubricants, disintegrants, surfactants, binders, colorants and flavors.
8. The extended release pharmaceutical composition according to claim
1 , wherein said rapid dissolving component is lactose.
9. The extended release pharmaceutical composition according to claim 1, wherein said slow dissolving component is hydroxypropyl methylcellulose.
10. The extended release pharmaceutical composition according to claim 1, wherein the weight ratio of rapid dissolving component(s) to slow dissolving component(s) is the ratio of extragranular rapid dissolving component to the slow dissolving component in the pharmaceutical composition.
11. A process for manufacturing extended release pharmaceutical composition of claim 1, wherein the process comprising: a. dry mixing minocycline or pharmaceutically acceptable salts, slow dissolving component(s), rapid dissolving component(s) and optionally other pharmaceutical acceptable excipients, b. granulating the resultant blend with using binder solution and drying the resultant granulates; c. mixing the dried granulates with rapid dissolving component(s), slow dissolving component(s) and optionally other pharmaceutically acceptable excipients; d. formulating the mixture into a suitable dosage form; and e. coating the said dosage form with non-functional film coating layer.
12. The process according to claim 11 , wherein the dosage form is a tablet.
PCT/IN2009/000596 2008-10-21 2009-10-21 Extended release pharmaceutical composition of minocycline and process thereof WO2010046932A2 (en)

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US8268804B2 (en) 2005-06-24 2012-09-18 Medicis Pharmaceutical Corporation Minocycline oral dosage forms for the treatment of acne
US8722650B1 (en) 2005-06-24 2014-05-13 Medicis Pharmaceutical Corporation Extended-release minocycline dosage forms
US9084802B2 (en) 2010-05-12 2015-07-21 Rempex Pharmaceuticals, Inc. Tetracycline compositions
CN105534941A (en) * 2016-01-04 2016-05-04 浙江美华鼎昌医药科技有限公司 Minocycline hydrochloride sustained release tablets and preparation method
US9561241B1 (en) 2011-06-28 2017-02-07 Medicis Pharmaceutical Corporation Gastroretentive dosage forms for minocycline
US10543298B2 (en) 2015-11-24 2020-01-28 Hovione Scientia Limited Salts of tetracyclines
US11103517B2 (en) 2015-04-07 2021-08-31 Dr. Reddy's Laboratories Ltd. Pharmaceutical compositions for minocycline

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8268804B2 (en) 2005-06-24 2012-09-18 Medicis Pharmaceutical Corporation Minocycline oral dosage forms for the treatment of acne
US8722650B1 (en) 2005-06-24 2014-05-13 Medicis Pharmaceutical Corporation Extended-release minocycline dosage forms
US9084802B2 (en) 2010-05-12 2015-07-21 Rempex Pharmaceuticals, Inc. Tetracycline compositions
US9744179B2 (en) 2010-05-12 2017-08-29 Rempex Pharmaceuticals, Inc. Tetracycline compositions
US11944634B2 (en) 2010-05-12 2024-04-02 Melinta Subsidiary Corp. Tetracycline compositions
US9561241B1 (en) 2011-06-28 2017-02-07 Medicis Pharmaceutical Corporation Gastroretentive dosage forms for minocycline
US11103517B2 (en) 2015-04-07 2021-08-31 Dr. Reddy's Laboratories Ltd. Pharmaceutical compositions for minocycline
US10543298B2 (en) 2015-11-24 2020-01-28 Hovione Scientia Limited Salts of tetracyclines
CN105534941A (en) * 2016-01-04 2016-05-04 浙江美华鼎昌医药科技有限公司 Minocycline hydrochloride sustained release tablets and preparation method

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