WO1997009980A1 - Pharmaceutical formulations containing darifenacin - Google Patents

Pharmaceutical formulations containing darifenacin Download PDF

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Publication number
WO1997009980A1
WO1997009980A1 PCT/EP1996/003719 EP9603719W WO9709980A1 WO 1997009980 A1 WO1997009980 A1 WO 1997009980A1 EP 9603719 W EP9603719 W EP 9603719W WO 9709980 A1 WO9709980 A1 WO 9709980A1
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WO
WIPO (PCT)
Prior art keywords
darifenacin
dosage form
pharmaceutically acceptable
acceptable salt
gastrointestinal tract
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1996/003719
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English (en)
French (fr)
Inventor
Thomas Francis Dolan
Michael John Humphrey
Donald John Nichols
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pfizer Ltd Great Britain
Pfizer Research and Development Co NV SA
Pfizer Inc
Original Assignee
Pfizer Ltd Great Britain
Pfizer Research and Development Co NV SA
Pfizer Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10780813&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1997009980(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to BR122012014331A priority Critical patent/BR122012014331B8/pt
Priority to DE69626397T priority patent/DE69626397T2/de
Priority to AT96930085T priority patent/ATE233090T1/de
Priority to DE200512000024 priority patent/DE122005000024I1/de
Priority to PL96325598A priority patent/PL185604B1/pl
Priority to BR9610153A priority patent/BR9610153A/pt
Priority to JP51160297A priority patent/JP3403203B2/ja
Priority to AU69275/96A priority patent/AU703866C/en
Priority to DK96930085T priority patent/DK0850059T3/da
Priority to KR1019980701907A priority patent/KR100348585B1/ko
Priority to DE1996626397 priority patent/DE122005000024I2/de
Application filed by Pfizer Ltd Great Britain, Pfizer Research and Development Co NV SA, Pfizer Inc filed Critical Pfizer Ltd Great Britain
Priority to NZ316924A priority patent/NZ316924A/xx
Priority to HU9802339A priority patent/HU225236B1/hu
Priority to CA002230314A priority patent/CA2230314C/en
Priority to IL12274696A priority patent/IL122746A/xx
Priority to US09/029,072 priority patent/US6106864A/en
Priority to EP96930085A priority patent/EP0850059B1/en
Priority to HU0500976A priority patent/HU227397B1/hu
Publication of WO1997009980A1 publication Critical patent/WO1997009980A1/en
Priority to NO19981073A priority patent/NO314783B1/no
Anticipated expiration legal-status Critical
Priority to NL300190C priority patent/NL300190I2/nl
Priority to NO2005009C priority patent/NO2005009I2/no
Priority to CY200500007C priority patent/CY2005007I1/el
Priority to FR05C0019C priority patent/FR05C0019I2/fr
Priority to LU91163C priority patent/LU91163I2/fr
Ceased legal-status Critical Current

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Classifications

    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
    • A61K31/4025—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil not condensed and containing further heterocyclic rings, e.g. cromakalim
    • 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
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
    • 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
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
    • A61K9/1605—Excipients; Inactive ingredients
    • A61K9/1611—Inorganic compounds
    • 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
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
    • A61K9/1605—Excipients; Inactive ingredients
    • A61K9/1629—Organic macromolecular compounds
    • A61K9/1652—Polysaccharides, e.g. alginate, cellulose derivatives; Cyclodextrin
    • 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
    • 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
    • A61K9/2009—Inorganic compounds
    • 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
    • A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
    • A61K9/5005—Wall or coating material
    • A61K9/5021—Organic macromolecular compounds
    • A61K9/5036—Polysaccharides, e.g. gums, alginate; Cyclodextrin
    • A61K9/5042—Cellulose; Cellulose derivatives, e.g. phthalate or acetate succinate esters of hydroxypropyl methylcellulose
    • A61K9/5047—Cellulose ethers containing no ester groups, e.g. hydroxypropyl methylcellulose
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
    • A61P1/12—Antidiarrhoeals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P13/00—Drugs for disorders of the urinary system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P13/00—Drugs for disorders of the urinary system
    • A61P13/02—Drugs for disorders of the urinary system of urine or of the urinary tract, e.g. urine acidifiers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P15/00—Drugs for genital or sexual disorders; Contraceptives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • 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
    • A61K9/0012—Galenical forms characterised by the site of application
    • A61K9/0031—Rectum, anus
    • 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
    • A61K9/02—Suppositories; Bougies; Bases therefor; Ovules

Definitions

  • This invention relates to pharmaceutical dosage forms of darifenacin and its pharmaceuti ⁇ cally acceptable salts.
  • Darifenacin is (S)-2- ⁇ 1 -[2-(2,3-dihydrobenzofuran-5-yl)ethyl]-3-pyrrolidinyl ⁇ -2,2-diphenyl- acetamide and is disclosed in European Patent N° 0388054, Examples 1 B and 8, and is referred to therein as 3-(S)-(-)-(1-carbamoyl-1.1-diphenylmethyl)-1-[2-(2,3-dihydro- benzofuran-5-yl)ethyl]pyrrolidine. It is indicated in the treatment of urinary incontinence and irritable bowel syndrome and has the following structure:
  • the metabolite is 6-fold less selective for muscarinic M3 receptors over M1 receptors in comparison with darifenacin, and so the metabolite is more likely than darifenacin to produce unwanted side-effects such as dry mouth, confusion and blurred vision.
  • a pharmaceutical dosage form adapted for administration to the gastrointestinal tract of a patient, comprising darifenacin, or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable adjuvant, diluent or carrier; characterized in that the dosage form is adapted to deliver at least 10% by weight of the darifenacin, or the pharmaceutically acceptable salt thereof, to the lower gastrointestinal tract of the patient.
  • the dosage forms of the invention may be of the sustained or delayed release type, and so release the darifenacin, or the pharmaceutically acceptable salt thereof, to the gastrointestinal tract of the patient over or after a sustained period of time following administration of the dosage form to the patient.
  • conventional rectal formulations may be used.
  • lower gastrointestinal tract is meant the portion of the gastrointestinal tract between the region of the ileo-caecal junction and the rectum inclusive.
  • Patient means primarily a human patient, although the formulations of the present invention may be useful in the treatment of non-human animals.
  • the dosage forms of the invention are adapted to deliver at least 25%, and more preferably 50% by weight of the darifenacin, or the pharmaceutically acceptable salt thereof, to the lower gastrointestinal tract.
  • no more than 90% by weight of the darifenacin, or the pharmaceutically acceptable salt thereof is released 4 hours after dosing; more preferably no more than 90% by weight of the darifenacin, or the pharmaceutically acceptable salt thereof, is released 8 hours after dosing; and most preferably, no more than 90% by weight of the darifenacin, or the pharmaceutically acceptable salt thereof, is released 16 hours after dosing.
  • the sustained release formulations of the invention may be defined alterna ⁇ tively as a pharmaceutical dosage form adapted for administration to the gastrointestinal tract of a patient, comprising darifenacin, or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable adjuvant, diluent or carrier, characterized in that the dosage form is adapted to release the darifenacin, or the pharmaceutically acceptable salt thereof, in Apparatus 1 described in USP XXII at page 1578, having baskets of 40 mesh (381 ⁇ m apertures), a rotation speed of 100 rpm and a dissolution medium of water at 37°C, over a sustained period of time.
  • Particular oral dosage forms include:
  • a matrix containing the active com ⁇ pound may be formed into a multiparticulate and/or coated with an impermeable coating provided with an aperture.
  • the active compound is embedded or dispersed in a matrix of another material which serves to retard the release of the active compound into an aqueous environment.
  • suitable matrix materials include hydroxypropyl methylcellulose and hydroxypropyl cellulose.
  • Matrix formulations according to the present invention preferably comprise high molecular weight (i.e. 85,000-95,000 mass units) hydroxypropyl methylcellulose.
  • the active compound is present in a number of particles which also contain adjuvants, diluents or carriers.
  • Suitable adjuvants, diluents and carriers include microcrystalline cellulose (preferably having a particle size of 50 ⁇ m) and lactose (preferably having a particle size equivalent to 1 10 mesh (137.5 ⁇ m apertures)).
  • the blended ingredients are formed into a wet mass which is extruded and spheronized to form beads which are then dried.
  • Impermeable coatings are applied to tablets containing the active compound. "Impermeable” means that no significant transport of the active compound can take place across the coating during the intended release period of the formulation. Suitable materials include film-forming polymers and waxes [e.g. thermoplastic polymers such as poly(ethylene-covinyl acetate), poly(vinyl chloride), ethyl cellulose and cellulose acetate] and the coating thickness is preferably greater than 100 ⁇ m. The aperture may be formed by drilling, or if the coated formulation is conical, by cutting off the tip. (d) Coatings of low aqueous solubility include polymers.
  • pH-dependent polymers may be pH-dependent, for example substantially insoluble at pH ⁇ 5 (so that dissolution does not take part in the stomach) and water soluble at pH>5.
  • Preferred pH- sensitive polymers include shellac, phthalate derivatives (including cellulose acetate phthalate, polyvinylacetate phthalate), polyacrylic acid derivatives, and vinyl acetate and crotonic acid copolymers.
  • Suitable membrane coatings allow the active compound to diffuse across the membrane or through liquid filled pores within the membrane.
  • Suitable coating materials include polymers such as cellulose ester or ether, and acrylic polymers. Preferred materials include ethyl cellulose, cellulose acetate and cellulose acetate butyrate.
  • Darifenacin resinates may be prepared by treating anionic ion exchange resin beads (for example sodium polystyrene sulphonate) with an acid addition salt of darifenacin.
  • anionic ion exchange resin beads for example sodium polystyrene sulphonate
  • Pulsatile devices have the capacity to release drug at various points of the gastrointestinal tract. They may depend on osmotic potential to trigger release (see US
  • Patent N° 3,952,741 or erosion of polymeric material due to changes in pH or microbial degradation.
  • Suitable polymeric materials include pectin [Rubinstein ef al, 1991 , Pectic salt as a colonic delivery system, Proceed. Intern. Symp. Control. Rel. Bioact. Mater.], methacrylate-galactoman ⁇ an [Lehman et al, 1991 , Methacrylate-galactomannan coating for colonic specific drug delivery, ibid], matter containing azobonds [Kopeckova et al,
  • Delivery to specific points of the gastrointestinal tract may also be achieved using multilayered tablets [Gazzaniga ef al, 1993, Time dependent oral delivery system for colon specific release, ibid], or hydrogel plugs in a capsule [Binns ef al, Application of a pH-independent PEG-based hydrogel to afford pulsatile drug delivery].
  • the darifenacin is in the form of its hydrobromide salt (except when the darifenacin is present as an ion exchange resin complex).
  • a preferred oral formulation is a tablet consisting essentially of darifenacin hydrobromide in a high molecular weight hydroxypropyl methylcellulose matrix together with anhydrous dibasic calcium phosphate and magnesium stearate.
  • the tablet may be colour coated by conventional methods.
  • hydroxypropyl methylcellulose makes up 56-58% w/w of the tablet
  • magnesium stearate makes up approximately 1% of the tablet
  • darifenacin hydrobromide and anhydrous dibasic calcium phosphate make up the balance.
  • the darifenacin hydrobromide content may range from 4mg-54mg per tablet, depending on the dose to be delivered. Such tablets would be suitable for administration once daily.
  • the dosage forms of the present invention are adapted for oral administration, but they may also be adpated for rectal administration.
  • Rectal suppository formulations may be prepared by dispersing the active ingredient in hardened oils or waxes using conventional methods.
  • a method of treatment of irritable bowel syndrome or urinary incontinence which comprises delivering darifenacin, or a pharmaceutically acceptable salt thereof, to the lower gastrointestinal tract of a patient in need of such treatment.
  • the method may be performed by administering a dosage form of the invention to the gastrointestinal tract of a patient in need of such treatment.
  • MethocelTM K4M - a high molecular weight hydroxypropyl methylcellulose with a number average in molecular weight of 89,000. It is classified in the USP as 2208 and a 2% solution in water has a nominal viscosity of 4000cps. It has a methoxy content of 19-24% and a hydroxypropcxy content of 7-12%; MethocelTM E4M - a high molecular weight hydroxypropyl methylcellulose with a number average molecular weight of 93,000. It is classified in the USP as 2910 and a 2% solution in water has a nominal viscosity of 4000cps. It has a methoxy content of 28-30% and a hydroxypropoxy content of 7-12%;
  • MethocelTM K100LV - a low molecular weight hydroxypropyl methylcellulose It is classified in the USP as 2208 and a 2% solution in water has a nominal viscosity of
  • Klucel EFTM - hydroxy propyl cellulose with a number average molecular weight of 60,000;
  • Example 1 comparative. Fast release matrix tablet
  • Turbula blender for 10 minutes. The mixture was then screened using a 30 mesh (500 ⁇ m apertures) screen and reblended for a further 10 minutes. Magnesium stearate was screened through a 30 mesh (500 ⁇ m apertures) screen and added to the mixture before blending for a further 5 minutes. The blend was then subjected to compression on a tabletting machine using 8mm round normal convex tooling to make 1250 tablets.
  • the Methocel K4M, E4M, darifenacin and Fast-flo lactose were blended in a suitable blender for 10 minutes.
  • the mixture was then screened using a 30 mesh (500 ⁇ m apertures) screen and reblended for a further 10 minutes.
  • Magnesium stearate was screened through a 30 mesh (500 ⁇ m apertures) screen and added to the mixture before blending for a further 5 minutes.
  • the blend was then subjected to compression on a tabletting machine using 8mm round normal convex tooling to make 1250 tablets.
  • the Methocel K4M, darifenacin and anhydrous dibasic calcium phosphate were blended in a Turbula blender for 10 minutes. The mixture was then screened using a 30 mesh (500 ⁇ m apertures) screen and reblended for a further 10 minutes. Magnesium stearate was screened through a 30 mesh (500 ⁇ m apertures) screen and added to the mixture before blending for a further 5 minutes. The blend was then subjected to compression on a tabletting machine using 8mm round normal convex tooling to make 1250 tablets.
  • Example 5 Ion exchange resin formulation ingredient g/batch
  • the disodium edetate and sodium polystyrene sulphonate were suspended in water. This suspension was then heated to 50 ⁇ C whilst stirring. The darifenacin hydrobromide was then added to the suspension and the suspension stirred for a further 2 hours at 50 ⁇ C. The darifenacin polystyrene sulphonate was then filtered off and washed until free of bromide ions. The darifenacin resinate was then dried under vacuum at 25°C for approximately 16 hours.
  • Dissolution of the formulations of Examples 1-4 was performed using a rotating basket apparatus (Apparatus 1, USPXXII, p. 1578).
  • the formulations were placed in baskets (40 mesh, 381 ⁇ m apertures) using a rotation speed of 100rpm in 900ml water at 37°C +/- 0.5°C.
  • 10ml aliquots were removed from the dissolution vessel from a zone midway between the surface of the dissolution medium and the top of the basket not less than 1cm from the vessel wall.
  • the first 7ml is discarded and the remaining solution transferred to an HPLC vial for subsequent analysis.
  • the release of darifenacin from the formulation of Example 5 was determined according to USP XXIII Apparatus 4 (page 1794). Using a flow rate of 250ml/hour solutions at 37°C of the following pH were used to assess release: 0-1 hr pH 1.5; 1-2hr pH 2.5; 2-3.5hr pH4.5; 3.5-5hr pH 6.9; 5-24hr pH 7.2.
  • Dissolution of the formulation of Example 6 was performed using a rotating basket apparatus (Apparatus 1 , USPXXII, p 1578).
  • the formulations were placed in baskets (40mesh, 381 ⁇ m apertures) using a rotation speed of 100rpm in 900mi water at 37°C +/- 0.5°C.
  • a 20ml aliquot of dissolution media was removed from a zone midway between the surface of the dissolution media and the top of the basket not less than 1cm from the vessel wall.
  • the aliquots were filtered (0.45 ⁇ m, Acrodisc) and the first 5ml of filtrate discarded. 5ml of the remaining filtrate was then diluted to 25ml using a 1 :1 (v/v) solution of water/methanol prior to analysis by HPLC.
  • HPLC High Performance Liquid Chromatography
  • the mobile phase used was an aqueous 0.03M potassium dihydrogen orthophosphate at pH 3.5/methanol, (1000:800 v/v) using a flow rate of 1.5ml/min at 37°C and a sample size of 20 ⁇ L.
  • Detection was by fluorescence operating at an excitation wavelength of 288nm (slit width 18nm) and an emission wavelength of 320nm (slit width 18nm).
  • Example 6 High Performance Liquid Chromatography (HPLC) was performed using a Novapack C18 column.
  • the mobile phase was aqueous 0.01 M sodium acetate containing 0.2%v/v triethylamine at pH 6.0/methanol/acetonitrile (45:54:1 , v/v/v) using a flow rate of 1.0ml/min and a sample size of 50 ⁇ l.
  • Detection was by ultraviolet spectroscopy at 230nm.
  • Example 1 formulation (comparative) Time (h) % release (range)
  • the table below shows the ratio of AUC values for darifenacin and metabolite (AUC da ⁇ fe ⁇ ac ⁇ n :AUC metab0 ⁇ , te ) and the relative bioavailability of darifenacin (F re , da ⁇ f ⁇ ac.n) and metabolite (F re ⁇ metab oi ⁇ t e) or the formulations versus an immediate release capsule.
  • Ratio of AUC of darifenacin metabolite and relative bioavailability (F ⁇ ) versus an immediate release capsule

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Urology & Nephrology (AREA)
  • Biophysics (AREA)
  • Molecular Biology (AREA)
  • Reproductive Health (AREA)
  • Endocrinology (AREA)
  • Communicable Diseases (AREA)
  • Oncology (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicinal Preparation (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
PCT/EP1996/003719 1995-09-15 1996-08-21 Pharmaceutical formulations containing darifenacin Ceased WO1997009980A1 (en)

Priority Applications (24)

Application Number Priority Date Filing Date Title
HU9802339A HU225236B1 (en) 1995-09-15 1996-08-21 Pharmaceutical formulations containing darifenacin
NZ316924A NZ316924A (en) 1995-09-15 1996-08-21 Darifenacin containing sustained release dosage forms for delivery in the lower gi tract
AT96930085T ATE233090T1 (de) 1995-09-15 1996-08-21 Darifenacin enthaltende pharmazeutische zubereitungen
DE200512000024 DE122005000024I1 (de) 1995-09-15 1996-08-21 Darifenacin enthaltende Pharmazeutische Zubereitungen.
CA002230314A CA2230314C (en) 1995-09-15 1996-08-21 Pharmaceutical formulations
BR9610153A BR9610153A (pt) 1995-09-15 1996-08-21 Formulações farmacêuticas
JP51160297A JP3403203B2 (ja) 1995-09-15 1996-08-21 ダリフェナシン含有製剤
AU69275/96A AU703866C (en) 1995-09-15 1996-08-21 Pharmaceutical formulations containing darifenacin
DK96930085T DK0850059T3 (da) 1995-09-15 1996-08-21 Farmaceutiske formuleringer indeholdende darifenacin
KR1019980701907A KR100348585B1 (ko) 1995-09-15 1996-08-21 다리페나신을함유하는약학제제
DE1996626397 DE122005000024I2 (de) 1995-09-15 1996-08-21 Darifenacin enthaltende Pharmazeutische zuberreitungen
DE69626397T DE69626397T2 (de) 1995-09-15 1996-08-21 Darifenacin enthaltende pharmazeutische zubereitungen
HU0500976A HU227397B1 (en) 1995-09-15 1996-08-21 Pharmaceutical formulations containing darifenacin
BR122012014331A BR122012014331B8 (pt) 1995-09-15 1996-08-21 formulações farmacêuticas
PL96325598A PL185604B1 (pl) 1995-09-15 1996-08-21 Preparat farmaceutyczny zawierający bromowodorek darifenacyny
IL12274696A IL122746A (en) 1995-09-15 1996-08-21 Pharmaceutical formulations containing darifenacin
US09/029,072 US6106864A (en) 1995-09-15 1996-08-21 Pharmaceutical formulations containing darifenacin
EP96930085A EP0850059B1 (en) 1995-09-15 1996-08-21 Pharmaceutical formulations containing darifenacin
NO19981073A NO314783B1 (no) 1995-09-15 1998-03-11 Farmasoytiske formuleringer inneholdende darifenacin
NL300190C NL300190I2 (nl) 1995-09-15 2005-03-25 Farmaceutische formuleringen met darifenacine.
NO2005009C NO2005009I2 (no) 1995-09-15 2005-04-08 Emselex-darifenacin. Iupac-navn: (S)-2-ä1-Ä2-(2,3 -dihydrobenzofuran-5-yl)etylÜ-3-pyrrolidinylü-2,2-difenylacetamid
CY200500007C CY2005007I1 (el) 1995-09-15 2005-04-14 Φαρμακευτικες συνθεσεις που περιεχουν δαριφενακινη
FR05C0019C FR05C0019I2 (https=) 1995-09-15 2005-04-19
LU91163C LU91163I2 (fr) 1995-09-15 2005-04-19 Hydrobromure de darifénacine et ses dérivés pharmaceutiquement acceptables (EMSELEX.

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EP0850059B1 (en) 2003-02-26
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