EP1703900A1 - Controlled release ketoprofen formulation - Google Patents

Controlled release ketoprofen formulation

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Publication number
EP1703900A1
EP1703900A1 EP04800455A EP04800455A EP1703900A1 EP 1703900 A1 EP1703900 A1 EP 1703900A1 EP 04800455 A EP04800455 A EP 04800455A EP 04800455 A EP04800455 A EP 04800455A EP 1703900 A1 EP1703900 A1 EP 1703900A1
Authority
EP
European Patent Office
Prior art keywords
pharmaceutical formulation
polymer
formulation according
ketoprofen
pellets
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.)
Withdrawn
Application number
EP04800455A
Other languages
German (de)
French (fr)
Inventor
Miha Tomaz Jaklic
Judita Sirca
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.)
Lek Pharmaceuticals dd
Original Assignee
Lek Pharmaceuticals dd
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
Application filed by Lek Pharmaceuticals dd filed Critical Lek Pharmaceuticals dd
Publication of EP1703900A1 publication Critical patent/EP1703900A1/en
Withdrawn legal-status Critical Current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
    • A61K9/48—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
    • 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
    • A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
    • A61K31/19—Carboxylic acids, e.g. valproic acid
    • A61K31/192—Carboxylic acids, e.g. valproic acid having aromatic groups, e.g. sulindac, 2-aryl-propionic acids, ethacrynic acid 
    • 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
    • A61K9/5026—Organic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates

Definitions

  • This invention relates to a new oral controlled release ketoprofen pharmaceutical formulations for once daily administration.
  • Ketoprofen which is chemically 2-(3-benzoylphenyl) propionic acid, is a non- steroidal anti-inflammatory drug with a ⁇ ti-inflammatory, analgesic and antipyretic properties. Ketoprofen is a weak acid, almost insoluble in water. It is quickly absorbed from the upper gastrointestinal tract and is rapidly eliminated from the body.
  • ketoprofen controlled release formulations are known in the art. Among those are also multi-unit dosage forms, e.g. capsules containing granules, pellets or tablets, covered by a release-controlling coating.
  • EP 403 383 discloses pharmaceutical ketoprofen dosage form containing granules, in which the extruded core contains ketoprofen and microcrystalline cellulose, while the coating contains a water-soluble cellulose derivative and 60 to 90% of cellulose derivative, which is insoluble in water.
  • the coating contains preferably ethyl cellulose and hydroxypropyl methylcellulose.
  • US 6197347 describes pellets having an inert core to which ketoprofen has been applied, and a coating which contains ethyl cellulose and shellac. Described are also capsules containing these pellets.
  • WO 00/64433 and WO 00/64432 describe ketoprofen prolonged release microgranules containing an inert core to which ketoprofen is applied and a coating comprising acrylic polymers Eudragit RL and Eudragit SR in the ratio of 50:50 or 90:10. Capsules containing 200 mg of ketoprofen are described.
  • EP 653935 describes peiletised sustained release pharmaceutical compositions of poorly soluble non-steroidal anti-inflammatory ingredients, preferably diclofenac, ketorolac and indomethacin.
  • the active ingredient layer is applied to the inert pellet core.
  • the coating layer contains an insoluble polymer, an acidoresistant polymer, and a plasticiser. The ratio of the acidoresistant polymer present in the coating is at least 30%.
  • EP 288138 describes multi-unit controlled release pharmaceutical dosage forms of non-steroidal anti-inflammatory ingredients, in which the spheroid cores contain at least 70% of microcrystalline cellulose and at least one water-soluble and/or swelling cellulose derivative, e.g. hydroxypropy! cellulose or hydroxypropyl methylcellulose.
  • the object of the present invention is to provide a safe controlled release pharmaceutical formulation that can provide suitable ketoprofen therapeutic levels for 24 hours and is suitable for once daily administration.
  • This invention provides for a novel controlled release multi-unit pharmaceutical formulation comprising ketoprofen, used for once daily administration.
  • the subject of the invention is a hard gelatine capsule comprising ketoprofen pellets, consisting of an extruded core and a coating. Coated pellets are designed to prevent release of acidic ketoprofene in the stomach, and therefore to protect gastric mucosa against the acid ingredient. After passage of the pellets into neutral environment of the duodenum and small intestine, they gradually release ketoprofen and provide adequate plasma concentrations of ketoprofen over an extended period of time.
  • This invention relates also to pellets comprising ketoprofen.
  • the composition of the pellet cores is very simple and allows incorporation of a high amount of the active ingredient in the core.
  • Pellet cores may contain only ketoprofen and microcrystalline cellulose.
  • Ketoprofen may be present in an amount from about 50 to about 97 % w/w of the pellet core.
  • Microcrystalline cellulose may be any commercially available form of microcrystalline cellulose, e.g. various types of Avicel ® , Emocel ® , Vivacel ® , and the like. Particularly suitable is Avicel ® PH 101. Appropriate is also silicified microcrystalline cellulose, e. g. Prosolv ® . Pellet cores may comprise from about 3 to about 50 % w/w of microcrystalline cellulose.
  • Pellet cores may optionally contain other excipients, such as e. g. binders (e. g. various types of polyvinylpyrrolidone, gelatine, various types of starch, different carboxymethyl celluloses, mono- and disaccharides, etc.), various surfactants (polysorbate 80, sodium lauryl sulphate, etc.), fillers (e. g. lactose and other mono- and disaccharides, calcium phosphate, calcium hydrogen phosphate), disintegrants (various starches, sodium starch glycolate, cross-linked sodium carboxymethyl cellulose, cross-linked polyvinylpyrrolidone, and the like).
  • binders e. g. various types of polyvinylpyrrolidone, gelatine, various types of starch, different carboxymethyl celluloses, mono- and disaccharides, etc.
  • various surfactants polysorbate 80, sodium lauryl sulphate, etc.
  • fillers e. g
  • the coating applied to the core comprises at least one acidoresistant polymer and at least one insoluble polymer. Only one coating is used that provides delayed release of ketoprofen depending on the pH, and an prolonged release over a prolonged period of time.
  • the coating contains preferably only talc besides the polymers and the colouring agent, if needed.
  • One coating is of technological advantage, as it is prepared once and applied once.
  • the manufacturing process is environment friendly because it does not require usage of organic solvents. Water is the only solvent used.
  • the acidoresistant polymer may be any acidoresistant polymer which is available in the form of aqueous dispersion, e. g. acrylic polymers (Eudragit ® ), cellulose acetate phthalate (Aquateric ® ), hydroxypropyl methylcellulose acetate succinate (Aqoat ® ), carboxymethylethyl cellulose ether (Duodcell ® ), polyvinyl acetate phthalate (Sureteric ® ).
  • Eudragit ® L 30 D-55 is a particularly suitable acidoresistant polymer; it is anionic copolymer of methacrylic acid and methylmethacrylate in the ratio 1 :1 , which is available in the form of aqueous dispersion 30 %.
  • the insoluble polymer may be any insoluble polymer available in the form of aqueous dispersion, e. g. ethyl cellulose (Surelease ® , Aquacoat ® ) and acrylic polymers used for controlled release, such as Eudragit ® NE 30 D or Eudragit ® RS 30 D.
  • aqueous dispersion e. g. ethyl cellulose (Surelease ® , Aquacoat ® ) and acrylic polymers used for controlled release, such as Eudragit ® NE 30 D or Eudragit ® RS 30 D.
  • a particularly suitable insoluble polymer is Eudragit ® NE 30 D, not soluble, but swellable in water, which is a copolymer of ethylacrylate and methylmetacrylate in the ratio 2:1 , which is available in the form of 30 % aqueous dispersion.
  • the ratio of the insoluble polymer and of acidoresistant polymer may be between 7:3 and 19:1 , preferably 3:1.
  • the amount of the coating may be from about 5 to about 20 % w/w of the total weight of the coated pellets, preferably from about 8 to about 12 % w/w of the coated pellets.
  • the coating may also contain other excipients, such as e. g. plasticisers (triethyl citrate, tributhyl citrate, triacetin, dibuthyl phthalate, polyethylene glycols (200, 400, 600, 6000), glycerol), antiadhesives (talc, magnesium stearate, glycerol monostearate), pigments, colouring agents, and dispersion agents.
  • plasticisers triethyl citrate, tributhyl citrate, triacetin, dibuthyl phthalate, polyethylene glycols (200, 400, 600, 6000), glycerol), antiadhesives (talc, magnesium stearate, glycerol monostearate), pigments, colouring agents, and dispersion agents.
  • plasticisers triethyl citrate, tributhyl citrate, triacetin, dibuthyl phthalate
  • polyethylene glycols 200, 400, 600
  • the size of the coated pellets may be from about 0.2 to about 2.0 mm, preferably between about 0.7 and about 1.3 mm.
  • Pellets according to the present invention may be prepared by processes well known in the art. Ketoprofen and microcrystalline cellulose powders are mixed homogeneously and granulated with demineralised water in which optionaly the binder has been dissolved. The granulated mixture is extruded and spheronized. The prepared pellet cores are dried in a fluid bed dryer.
  • Film coating shall be applied preferably by spraying the dispersion of polymers in fluid-bed devices, such as: Wurster chamber, Huettlin Kugelcoater, etc. Coating parameters vary from device to device, but it is important, however, that product temperature is below 30 °C. After the coating process, the film forming process shall be applied to pellets prepared in this fashion during 2 to 24 hours at temperatures from 40 to 60 °C.
  • the pellets thus obtained may be filled into capsules or sachets, or compressed into tablets.
  • the pharmaceutical formulation according to the present invention may also be a tablet.
  • Pellets of the invention may be mixed with the excipients and compressed into tablets.
  • Suitable excipients may be fillers (microcrystalline cellulose, calcium hydrogen phosphate), disintegrants (various starches, sodium carboxymethyl starch, cross-linked sodium carboxymethyl cellulose, cross-linked polyvinylpyrrolidone, glidants (talc, magnesium stearate, etc.).
  • the subject of this invention are also sachets comprising the pellets of the invention.
  • ketoprofen according to this invention may contain between about 100 mg and about 300 mg of ketoprofen, preferably about 200 mg of ketoprofen.
  • the pharmaceutical formulation according to the present invention may contain other active ingredients instead of ketoprofen, which are weak acids that are almost insoluble in water.
  • Such ingredients are e. g. naproxen and indomethacin.
  • Example 1 The invention is illustrated by, but not limited to, the following examples: Example 1
  • the mixture of ketoprofen and of microcrystalline cellulose powders was mixed homogeneously and granulated for 1 minute at 100 rpm with demineralised water in a high shear mixer.
  • the granulate was extruded in a screw extruder through the die plate with 1 mm openings at 95 rpm.
  • the extrudate was spheronised for 60 seconds in the spheroniser on a cross hatch plate (spheronising speed 12 m/s).
  • Pellet cores prepared in this fashion were dried in a fluid bed apparatus, at moderate fluidisation, at a temperature of the inlet air 30 °C, until a loss on drying under 2 %.
  • Pellets were sifted through sieves 0.7 mm and 1.2 mm, respectively.
  • Pellets with particle size between 0.7 and 1.2 mm were used for film coating.
  • the film coating dispersion was prepared so as to combine and mix individual components. During the coating process the dispersion was mixed thoroughly.
  • Pellet cores were coated in a fluid-bed machine.
  • the coating dispersion was sprayed on the pellet cores, with moderate fluidisation of pellets; the coating parameters were adjusted so as to preserve the product temperature between 20 and 25 °C.
  • the mixture of ketoprofen and of microcrystalline cellulose powders was mixed homogeneously and granulated for 1 minute at 100 rpm with demineralised water in a high shear mixer.
  • the granulate was extruded in a screw extruder through the die plate with 1 mm openings at 95 rpm.
  • the extrudate was spheronised for 60 seconds in the spheroniser on a cross hatch plate (spheronising speed 12 m/s).
  • Pellet cores prepared in this fashion were dried in a fluid bed apparatus using moderate fluidisation, at a temperature of the inlet air 30 °C, until a loss on drying under 2 %.
  • Pellets were sifted through sieves 0.7 and 1.2 mm.
  • pellets with particle size between 0.7 and 1.2 mm were used.
  • the coating dispersion was prepared so as to combine and mix the individual components. During the coating process the dispersion was mixed thoroughly.
  • Pellet cores were coated in a fluid-bed machine.
  • the coating dispersion was sprayed on the pellet cores, at moderate fluidisation of pellets; the coating parameters were adjusted so as to preserve the product temperature between 20 and 25 °C.
  • the film forming step was performed for 12 hours at 40 °C. Pellets were filled in capsules No. 1.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Medicinal Preparation (AREA)

Abstract

This invention provides a new controlled release multi-unit pharmaceutical dosage form comprising coated pellets containing an extruded core, which contains ketoprofen and microcrystalline cellulose, as well as coating which contains at least one acidoresistant polymer and at least one insoluble polymer. This formulation is suitable for once-a-day ketoprofen administration.

Description

Lek Pharmaceuticals d.d.
Controlled release ketoprofen formulation
This invention relates to a new oral controlled release ketoprofen pharmaceutical formulations for once daily administration.
Ketoprofen, which is chemically 2-(3-benzoylphenyl) propionic acid, is a non- steroidal anti-inflammatory drug with aπti-inflammatory, analgesic and antipyretic properties. Ketoprofen is a weak acid, almost insoluble in water. It is quickly absorbed from the upper gastrointestinal tract and is rapidly eliminated from the body.
Since the therapy is often long-lasting, pharmaceutical formulations which can be taken once daily and which can prevent the release of the acidic ketoprofen in the stomach are particularly suitable for the patient. There is a constant need for effective, safe, stable and patient-friendly once daily pharmaceutical controlled release ketoprofen dosage forms.
Many different types of ketoprofen controlled release formulations are known in the art. Among those are also multi-unit dosage forms, e.g. capsules containing granules, pellets or tablets, covered by a release-controlling coating.
EP 403 383 discloses pharmaceutical ketoprofen dosage form containing granules, in which the extruded core contains ketoprofen and microcrystalline cellulose, while the coating contains a water-soluble cellulose derivative and 60 to 90% of cellulose derivative, which is insoluble in water. The coating contains preferably ethyl cellulose and hydroxypropyl methylcellulose. US 6197347 describes pellets having an inert core to which ketoprofen has been applied, and a coating which contains ethyl cellulose and shellac. Described are also capsules containing these pellets.
WO 00/64433 and WO 00/64432 describe ketoprofen prolonged release microgranules containing an inert core to which ketoprofen is applied and a coating comprising acrylic polymers Eudragit RL and Eudragit SR in the ratio of 50:50 or 90:10. Capsules containing 200 mg of ketoprofen are described.
EP 653935 describes peiletised sustained release pharmaceutical compositions of poorly soluble non-steroidal anti-inflammatory ingredients, preferably diclofenac, ketorolac and indomethacin. The active ingredient layer is applied to the inert pellet core. The coating layer contains an insoluble polymer, an acidoresistant polymer, and a plasticiser. The ratio of the acidoresistant polymer present in the coating is at least 30%.
EP 288138 describes multi-unit controlled release pharmaceutical dosage forms of non-steroidal anti-inflammatory ingredients, in which the spheroid cores contain at least 70% of microcrystalline cellulose and at least one water-soluble and/or swelling cellulose derivative, e.g. hydroxypropy! cellulose or hydroxypropyl methylcellulose.
The object of the present invention is to provide a safe controlled release pharmaceutical formulation that can provide suitable ketoprofen therapeutic levels for 24 hours and is suitable for once daily administration.
Description of the invention
This invention provides for a novel controlled release multi-unit pharmaceutical formulation comprising ketoprofen, used for once daily administration. Preferably the subject of the invention is a hard gelatine capsule comprising ketoprofen pellets, consisting of an extruded core and a coating. Coated pellets are designed to prevent release of acidic ketoprofene in the stomach, and therefore to protect gastric mucosa against the acid ingredient. After passage of the pellets into neutral environment of the duodenum and small intestine, they gradually release ketoprofen and provide adequate plasma concentrations of ketoprofen over an extended period of time.
This invention relates also to pellets comprising ketoprofen. The composition of the pellet cores is very simple and allows incorporation of a high amount of the active ingredient in the core. Pellet cores may contain only ketoprofen and microcrystalline cellulose. Ketoprofen may be present in an amount from about 50 to about 97 % w/w of the pellet core.
Microcrystalline cellulose may be any commercially available form of microcrystalline cellulose, e.g. various types of Avicel®, Emocel®, Vivacel®, and the like. Particularly suitable is Avicel® PH 101. Appropriate is also silicified microcrystalline cellulose, e. g. Prosolv®. Pellet cores may comprise from about 3 to about 50 % w/w of microcrystalline cellulose.
Pellet cores may optionally contain other excipients, such as e. g. binders (e. g. various types of polyvinylpyrrolidone, gelatine, various types of starch, different carboxymethyl celluloses, mono- and disaccharides, etc.), various surfactants (polysorbate 80, sodium lauryl sulphate, etc.), fillers (e. g. lactose and other mono- and disaccharides, calcium phosphate, calcium hydrogen phosphate), disintegrants (various starches, sodium starch glycolate, cross-linked sodium carboxymethyl cellulose, cross-linked polyvinylpyrrolidone, and the like).
The coating applied to the core comprises at least one acidoresistant polymer and at least one insoluble polymer. Only one coating is used that provides delayed release of ketoprofen depending on the pH, and an prolonged release over a prolonged period of time.
The coating contains preferably only talc besides the polymers and the colouring agent, if needed. One coating is of technological advantage, as it is prepared once and applied once. The manufacturing process is environment friendly because it does not require usage of organic solvents. Water is the only solvent used.
The acidoresistant polymer may be any acidoresistant polymer which is available in the form of aqueous dispersion, e. g. acrylic polymers (Eudragit®), cellulose acetate phthalate (Aquateric®), hydroxypropyl methylcellulose acetate succinate (Aqoat®), carboxymethylethyl cellulose ether (Duodcell®), polyvinyl acetate phthalate (Sureteric®).
Eudragit® L 30 D-55 is a particularly suitable acidoresistant polymer; it is anionic copolymer of methacrylic acid and methylmethacrylate in the ratio 1 :1 , which is available in the form of aqueous dispersion 30 %.
The insoluble polymer may be any insoluble polymer available in the form of aqueous dispersion, e. g. ethyl cellulose (Surelease®, Aquacoat®) and acrylic polymers used for controlled release, such as Eudragit® NE 30 D or Eudragit® RS 30 D.
A particularly suitable insoluble polymer is Eudragit® NE 30 D, not soluble, but swellable in water, which is a copolymer of ethylacrylate and methylmetacrylate in the ratio 2:1 , which is available in the form of 30 % aqueous dispersion.
The ratio of the insoluble polymer and of acidoresistant polymer may be between 7:3 and 19:1 , preferably 3:1. The amount of the coating may be from about 5 to about 20 % w/w of the total weight of the coated pellets, preferably from about 8 to about 12 % w/w of the coated pellets.
The coating may also contain other excipients, such as e. g. plasticisers (triethyl citrate, tributhyl citrate, triacetin, dibuthyl phthalate, polyethylene glycols (200, 400, 600, 6000), glycerol), antiadhesives (talc, magnesium stearate, glycerol monostearate), pigments, colouring agents, and dispersion agents.
The size of the coated pellets may be from about 0.2 to about 2.0 mm, preferably between about 0.7 and about 1.3 mm.
Pellets according to the present invention may be prepared by processes well known in the art. Ketoprofen and microcrystalline cellulose powders are mixed homogeneously and granulated with demineralised water in which optionaly the binder has been dissolved. The granulated mixture is extruded and spheronized. The prepared pellet cores are dried in a fluid bed dryer.
Film coating shall be applied preferably by spraying the dispersion of polymers in fluid-bed devices, such as: Wurster chamber, Huettlin Kugelcoater, etc. Coating parameters vary from device to device, but it is important, however, that product temperature is below 30 °C. After the coating process, the film forming process shall be applied to pellets prepared in this fashion during 2 to 24 hours at temperatures from 40 to 60 °C.
The pellets thus obtained may be filled into capsules or sachets, or compressed into tablets.
The pharmaceutical formulation according to the present invention may also be a tablet. Pellets of the invention may be mixed with the excipients and compressed into tablets. Suitable excipients may be fillers (microcrystalline cellulose, calcium hydrogen phosphate), disintegrants (various starches, sodium carboxymethyl starch, cross-linked sodium carboxymethyl cellulose, cross-linked polyvinylpyrrolidone, glidants (talc, magnesium stearate, etc.).
The subject of this invention are also sachets comprising the pellets of the invention.
The pharmaceutical formulation of ketoprofen according to this invention may contain between about 100 mg and about 300 mg of ketoprofen, preferably about 200 mg of ketoprofen.
The release of ketoprofen from controlled release formulation of the present invention is such that less than 10 % of ketoprofen is released in 2 hours in a dissolution test in simulated gastric juice (pH=1.2). After that the medium is changed for artificial intestinal juice (pH = 6.8) and 20 - 50 % of ketoprofen is released in the following 2 hours, 40 - 70 % in 4 hours, and 55 - 90 % in 6 hours, and over 85 % after 18 hours. Dissolution testing shall be carried out in apparatus No. 1 according to USP (rotating basket).
The pharmaceutical formulation according to the present invention may contain other active ingredients instead of ketoprofen, which are weak acids that are almost insoluble in water. Such ingredients are e. g. naproxen and indomethacin.
Examples
The invention is ilustrated by, but not limited to, the following examples: Example 1
Method of preparation
The mixture of ketoprofen and of microcrystalline cellulose powders was mixed homogeneously and granulated for 1 minute at 100 rpm with demineralised water in a high shear mixer. The granulate was extruded in a screw extruder through the die plate with 1 mm openings at 95 rpm. The extrudate was spheronised for 60 seconds in the spheroniser on a cross hatch plate (spheronising speed 12 m/s). Pellet cores prepared in this fashion were dried in a fluid bed apparatus, at moderate fluidisation, at a temperature of the inlet air 30 °C, until a loss on drying under 2 %. Pellets were sifted through sieves 0.7 mm and 1.2 mm, respectively. Pellets with particle size between 0.7 and 1.2 mm were used for film coating. The film coating dispersion was prepared so as to combine and mix individual components. During the coating process the dispersion was mixed thoroughly.
Pellet cores were coated in a fluid-bed machine. The coating dispersion was sprayed on the pellet cores, with moderate fluidisation of pellets; the coating parameters were adjusted so as to preserve the product temperature between 20 and 25 °C.
In coated pellets the film forming step was performed for 12 hours at 40 °C. Pellets were filled in capsules No. 1.
Example 2
Method of preparation The mixture of ketoprofen and of microcrystalline cellulose powders was mixed homogeneously and granulated for 1 minute at 100 rpm with demineralised water in a high shear mixer. The granulate was extruded in a screw extruder through the die plate with 1 mm openings at 95 rpm. The extrudate was spheronised for 60 seconds in the spheroniser on a cross hatch plate (spheronising speed 12 m/s). Pellet cores prepared in this fashion were dried in a fluid bed apparatus using moderate fluidisation, at a temperature of the inlet air 30 °C, until a loss on drying under 2 %.
Pellets were sifted through sieves 0.7 and 1.2 mm. For the film coating process pellets with particle size between 0.7 and 1.2 mm were used.
The coating dispersion was prepared so as to combine and mix the individual components. During the coating process the dispersion was mixed thoroughly.
Pellet cores were coated in a fluid-bed machine. The coating dispersion was sprayed on the pellet cores, at moderate fluidisation of pellets; the coating parameters were adjusted so as to preserve the product temperature between 20 and 25 °C.
In coated pellets, the film forming step was performed for 12 hours at 40 °C. Pellets were filled in capsules No. 1.
Example 3
Release of the active ingredient from capsules, described in example 1;
Testing was performed using USP apparatus No. 1 at 37 °C.

Claims

Claims
1. A multi-unit controlled release pharmaceutical formulation comprising coated pellets comprising - an extruded core which comprises ketoprofen and microcrystalline cellulose - a coating which comprises at least one acidoresistant polymer and at least one insoluble polymer.
2. The multi-unit pharmaceutical formulation according to claim 1 , which is a capsule.
3. The multi-unit pharmaceutical formulation according to claim 1, characterized in that it comprises between 100 and 300 mg of ketoprofen.
4. The multi-unit pharmaceutical formulation according to claims 1 and 3, characterized in that it comprises 200 mg of ketoprofen .
5. The multi-unit pharmaceutical formulation according to claim 1, wherein the the pellet core comprises from 50% to 97 % w/w of ketoprofen.
6. The multi-unit pharmaceutical formulation according to claim 1 , wherein the acidoresistant polymer is selected from the group consisting of acrylic polymers, cellulose acetate phthalate, hydroxypropyl methylcellulose acetate succinate, carboxymethyl ether of cellulose, and polyvinyl acetate phthalate.
7. The multi-unit pharmaceutical formulation according to claims 1 and 6, wherein the acidoresistant polymer is selected from methacrylic acid and methylmethacrylate polymers .
8. The multi-unit pharmaceutical formulation according to claim 1 , wherein the insoluble polymer is selected from the group comprising ethyl cellulose and acrylic polymers.
9. The multi-unit pharmaceutical formulation according to claims 1 and 8, wherein the insoluble polymer is a copolymer of ethyl acrylate and methylmethacrylate in the ratio 2:1.
10. The multi-unit pharmaceutical formulation according to claim 1 , wherein the acidoresistant polymer : insoluble polymer ratio in the coating is between 3:7 to 1 :19.
11. The multi-unit pharmaceutical formulation according to claims 1 and 10, wherein the acidoresistant polymer : insoluble polymer ratio in the coating is 1 :3.
12. The multi-unit pharmaceutical formulation according to claim 1 , wherein the amount of the coating is from 5 to 20 % w/w of the coated pellets.
13. The multi-unit pharmaceutical formulation according to claims 1 and 12. wherein the amount of the coating is 8 to 12 % w/w of the coated pellets.
14. Pellets comprising - an extruded core which comprises ketoprofen and microcrystalline cellulose, and - coating which comprises at least one acidoresistant polymer and at least one insoluble polymer.
15. Pellets according to claim 14, wherein the acidoresistant polymer is metacrylic acid and methylmetacrylate copolymer in the ratio 1 :1.
16. Pellets according to claim 14, wherein the insoluble polymer is ethyl acrylate and methylmetacrylate copolymer in the ratio 2:1.
17. Pellets according to claim 14, wherein the acidoresistant polymer : insoluble polymer ratio is 1:3.
18. Pellets according to claim 14, wherein the amount of the coating is between 8 to 12 % w/w of the coated pellets.
19. A process for the preparation of pharmaceutical formulation according to claim 1 , comprising the following steps: - preparation of a homogeneous mixture of ketoprofen and of microcrystalline cellulose; - wet granulation with demineralised water; - extrusion of wet mixture; - spheronisation; - drying; - application of the coat; - filling of pellets into capsules or bags, or tableting.
EP04800455A 2003-11-12 2004-11-11 Controlled release ketoprofen formulation Withdrawn EP1703900A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SI200300275A SI21638A (en) 2003-11-12 2003-11-12 Pharmaceutical form with controlled release of ketopfofen
PCT/SI2004/000037 WO2005046652A1 (en) 2003-11-12 2004-11-11 Controlled release ketoprofen formulation

Publications (1)

Publication Number Publication Date
EP1703900A1 true EP1703900A1 (en) 2006-09-27

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EP04800455A Withdrawn EP1703900A1 (en) 2003-11-12 2004-11-11 Controlled release ketoprofen formulation

Country Status (3)

Country Link
EP (1) EP1703900A1 (en)
SI (1) SI21638A (en)
WO (1) WO2005046652A1 (en)

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Publication number Priority date Publication date Assignee Title
EP1935405A1 (en) * 2006-12-22 2008-06-25 LEK Pharmaceuticals D.D. Orally disintegrating tablets
JP2014516080A (en) 2011-06-08 2014-07-07 エスティーアイ ファーマ， エルエルシー Water-soluble pharmaceutically active organic compound formulation with controlled absorption for once-daily administration

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