WO1999059637A1 - Vorrichtung zur kontrollierten freisetzung von wirkstoff im gastrointestinaltrakt mit verzögerter pyloruspassage - Google Patents
Vorrichtung zur kontrollierten freisetzung von wirkstoff im gastrointestinaltrakt mit verzögerter pyloruspassage Download PDFInfo
- Publication number
- WO1999059637A1 WO1999059637A1 PCT/EP1999/003015 EP9903015W WO9959637A1 WO 1999059637 A1 WO1999059637 A1 WO 1999059637A1 EP 9903015 W EP9903015 W EP 9903015W WO 9959637 A1 WO9959637 A1 WO 9959637A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gastric juice
- bag
- active ingredient
- active
- release
- Prior art date
Links
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
- A61K9/0002—Galenical forms characterised by the drug release technique; Application systems commanded by energy
- A61K9/0007—Effervescent
-
- 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
- A61K9/2072—Pills, tablets, discs, rods characterised by shape, structure or size; Tablets with holes, special break lines or identification marks; Partially coated tablets; Disintegrating flat shaped forms
- A61K9/2077—Tablets comprising drug-containing microparticles in a substantial amount of supporting matrix; Multiparticulate tablets
- A61K9/2081—Tablets comprising drug-containing microparticles in a substantial amount of supporting matrix; Multiparticulate tablets with microcapsules or coated microparticles according to A61K9/50
-
- 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
- A61K9/70—Web, sheet or filament bases ; Films; Fibres of the matrix type containing drug
Definitions
- the invention relates to a device for the controlled release of active substance in the gastrointestinal tract with a delayed pyloric passage in the form of a pouch which is expandable on contact with gastric juice and which is formed with a polymer shell from a single-layer film or from a multilayer laminate, with a gas-producing substance on the inside upon contact with gastric juice contains non-reactive component, and the polymer shell of which consists wholly or partly of an active substance-containing layer in the form of a multiparticulate preparation which contains the active substance in a material which retards the release or is enveloped by it.
- Gastroretentive systems are known which are retained in the stomach over a defined longer period due to an increase in volume.
- the release characteristics of the active ingredient can be controlled by its shape, for example as microencapsulated particles, or by the properties of the membrane. As soon as the active ingredient has entered the gastric juice in the pouch and then diffused through the membrane wall and has thus entered the contents of the stomach, it can be absorbed through the gastric mucosa or through the intestine. Since the system remains in the stomach over a longer period of time, as described, the controlled release of active substance in the stomach takes place over this longer period, preferably up to 24 hours.
- a disadvantage of such systems is that the loading of the pouch with the active ingredient is relatively complicated on an industrial scale.
- the bags must be closed precisely after filling, which is associated with a high level of technical complexity.
- a possible weakness of the functionality can also be that the system is only activated when enough gastric juice gets into the inside of the bag on the one hand and, on the other hand, through the walls of this bag a diffusion of the active ingredients back into the stomach contents surrounding the system is done. There is a difficult to control and therefore undesirable time delay between the introduction of the capsule and the start of absorption.
- the invention has for its object to provide a gastroretentive, drug-containing device in the form of a pouch with the advantages of expandability in gastric juice and, as a result, delayed pyloric passage, which, with simplified technical feasibility, significantly improves the controllability of the release characteristics of the active ingredient without the requirement of an initially primary diffusion of gastric juice through the bag membrane into the inside of the bag and a secondary diffusion of active ingredient from the inside of the bag into the environment, with the resultant highly hydrophilic setting of the bag membrane.
- the object is achieved according to the invention in that a basic principle of the existing gastroretensive systems is used, namely the "inflation" to increase the volume of the system up to a size that excludes the passage into the duodenum.
- the active ingredient is not filled into the pouch of the gastroretentive system, but is introduced by loading the pouch walls with active ingredient in such a way that the active ingredient diffuses from the pouch wall into the contents of the stomach.
- This can be done by loading a correspondingly suitable polymer film, for example polyurethane film or a similar suitable film which forms the bag wall, directly during the production of the film, for example in such a way that the polymer with the active substance or an active substance preparation is processed in one mass, and that the mass is coated in a known manner on a suitable sub-web and the finished film is removed from the sub-web again.
- a solvent coating process and a hot melt coating process can be selected.
- active ingredient or active ingredient preparation can be applied to the outer region of the pouch by coating the film from which the pouch is made, or the pouch itself, so that it is located in an outer layer of the pouch or in limited areas thereof.
- the coating can also be applied to the inside of the bag, the bag consisting of a suitable film, possibly with corresponding holes, through which the active ingredient can diffuse into the stomach.
- Such coatings can advantageously be applied quickly, precisely and comparatively inexpensively, especially if a continuous and not a clocked metering takes place.
- the bag can consist of a multilayer laminate, one or more layers of this system containing active substance in different concentrations and releasing it in a controlled manner known to the person skilled in the art.
- the bag can partially - on one side - consist of a hydrophilic membrane where no active ingredient is applied or applied.
- a perforation of the bag membrane which can be made easily with known means and can be configured with adjustable functionality, is provided instead, which also advantageously has a rapid Expansion of the bag ensured by controllable internal gas generation.
- the drilling with small holes also has the advantage that any excess pressure that arises in the system can be reduced without further damage to the envelope of the bag.
- the outer, active substance-containing layers can be designed in a manner customary in transdermal therapeutic systems by forming one or more reservoir layers from which the active substance is released due to a controlled diffusion. However, they can also, like multilayer tablets or wafers, have abrasive layers that contain active substance in different concentrations and only dissolve over time.
- microencapsulated active substances in the abrasive layer the outer layer of which is enteric-resistant and which release the active substance - after leaving the stomach, for example under the influence of the bile secretion or other digestive secretions. This can prevent a change due to gastric juice.
- a combination of different layers is also conceivable, that is, a combination of an abrasive layer containing the active substance further outside and a solid layer delivering the active substance from a reservoir further inside.
- the gas-generating preparation is located inside the bag.
- the gas-generating preparation consists of a plate similar to a wafer or flat flexible tablet.
- the gas-forming preparation is applied by coating on the inside of the bag.
- the gas generator can be released in a controlled manner in such a way that, at the end of the desired application time, such a high pressure suddenly arises that it bursts the bag.
- both parts of the bag are joined together with an adhesive in such a way that the adhesive dissolves after the planned application time, so that the adhesive point no longer holds the two sides of the bag together and the bag collapses.
- the top and bottom of the bag are formed from reservoir layers similar to transdermal systems and perforated with the finest holes made according to known perforation techniques, e.g. are produced with laser beams or high-pressure liquid jets ("hydrojet”) in such a way that gastric juice can enter the inside of the pouch and thus allow for a rapid inflation.
- known perforation techniques e.g. are produced with laser beams or high-pressure liquid jets (“hydrojet”) in such a way that gastric juice can enter the inside of the pouch and thus allow for a rapid inflation.
- Such bag systems can preferably be made in the same manner as similar bag systems for transdermal application, e.g. as in US 3,598,122 (Zaffaroni), according to a displacement stitching method as described in WO 94/26346 (cup) or US 5,066,494 (cup), with the proviso that an adhesive layer as described in these documents is not is present, and that, as shown, at least one side of the bag must be hydrophilic or perforated.
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Medicinal Preparation (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99922163A EP1083933A1 (de) | 1998-05-18 | 1999-05-04 | Vorrichtung zur kontrollierten freisetzung von wirkstoff im gastrointestinaltrakt mit verzögerter pyloruspassage |
AU39307/99A AU3930799A (en) | 1998-05-18 | 1999-05-04 | Device for the controlled release of active agents in the gastrointestinal tractwith a prolonged pylorus passage |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1998122278 DE19822278A1 (de) | 1998-05-18 | 1998-05-18 | Vorrichtung zur kontrollierten Freisetzung von Wirkstoff im Gastrointestinaltrakt mit verzögerter Pyloruspassage |
DE19822278.5 | 1998-05-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999059637A1 true WO1999059637A1 (de) | 1999-11-25 |
Family
ID=7868181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/003015 WO1999059637A1 (de) | 1998-05-18 | 1999-05-04 | Vorrichtung zur kontrollierten freisetzung von wirkstoff im gastrointestinaltrakt mit verzögerter pyloruspassage |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1083933A1 (de) |
AU (1) | AU3930799A (de) |
DE (1) | DE19822278A1 (de) |
TW (1) | TW408021B (de) |
WO (1) | WO1999059637A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000067724A2 (de) * | 1999-05-06 | 2000-11-16 | Lts Lohmann Therapie-Systeme Ag | Gastroretentives system für verlängerte verweilzeit im magen bzw. im gastrointestinaltrakt |
US9439851B2 (en) | 2004-03-25 | 2016-09-13 | Sun Pharma Advanced Research Company Ltd. | Gastric retention system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0307904A1 (de) * | 1987-09-18 | 1989-03-22 | Ciba-Geigy Ag | Umhüllte Retardformen |
EP0326816A1 (de) * | 1988-02-05 | 1989-08-09 | LTS Lohmann Therapie-Systeme GmbH & Co. KG | Schwimmfähiges orales therapeutisches System |
DE4419818A1 (de) * | 1994-06-07 | 1995-12-14 | Lohmann Therapie Syst Lts | Wirkstoffträger zur kontrollierten Freisetzung von Wirkstoffen im Gastrointestinaltrakt mit verzögerter Pyloruspassage |
US5670171A (en) * | 1989-09-18 | 1997-09-23 | Recordati S.A. Chemical And Pharmaceutical Company | Liquid-suspension controlled-release pharmaceutical composition |
WO1998031341A1 (de) * | 1997-01-14 | 1998-07-23 | Lts Lohmann Therapie-Systeme Gmbh | Expandierbares gastroretentives therapie-system mit kontrollierter wirkstofffreisetzung im gastrointestinaltrakt |
-
1998
- 1998-05-18 DE DE1998122278 patent/DE19822278A1/de not_active Withdrawn
-
1999
- 1999-05-04 WO PCT/EP1999/003015 patent/WO1999059637A1/de not_active Application Discontinuation
- 1999-05-04 EP EP99922163A patent/EP1083933A1/de not_active Withdrawn
- 1999-05-04 AU AU39307/99A patent/AU3930799A/en not_active Abandoned
- 1999-05-15 TW TW88107903A patent/TW408021B/zh not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0307904A1 (de) * | 1987-09-18 | 1989-03-22 | Ciba-Geigy Ag | Umhüllte Retardformen |
EP0326816A1 (de) * | 1988-02-05 | 1989-08-09 | LTS Lohmann Therapie-Systeme GmbH & Co. KG | Schwimmfähiges orales therapeutisches System |
US5670171A (en) * | 1989-09-18 | 1997-09-23 | Recordati S.A. Chemical And Pharmaceutical Company | Liquid-suspension controlled-release pharmaceutical composition |
DE4419818A1 (de) * | 1994-06-07 | 1995-12-14 | Lohmann Therapie Syst Lts | Wirkstoffträger zur kontrollierten Freisetzung von Wirkstoffen im Gastrointestinaltrakt mit verzögerter Pyloruspassage |
WO1998031341A1 (de) * | 1997-01-14 | 1998-07-23 | Lts Lohmann Therapie-Systeme Gmbh | Expandierbares gastroretentives therapie-system mit kontrollierter wirkstofffreisetzung im gastrointestinaltrakt |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000067724A2 (de) * | 1999-05-06 | 2000-11-16 | Lts Lohmann Therapie-Systeme Ag | Gastroretentives system für verlängerte verweilzeit im magen bzw. im gastrointestinaltrakt |
WO2000067724A3 (de) * | 1999-05-06 | 2001-02-22 | Lohmann Therapie Syst Lts | Gastroretentives system für verlängerte verweilzeit im magen bzw. im gastrointestinaltrakt |
US9439851B2 (en) | 2004-03-25 | 2016-09-13 | Sun Pharma Advanced Research Company Ltd. | Gastric retention system |
Also Published As
Publication number | Publication date |
---|---|
DE19822278A1 (de) | 1999-12-02 |
AU3930799A (en) | 1999-12-06 |
EP1083933A1 (de) | 2001-03-21 |
TW408021B (en) | 2000-10-11 |
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