Gastrointestinal drug delivery system

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/28 (2006.01) A61K 9/16 (2006.01) A61K 9/22 (2006.01) A61K 9/48 (2006.01)

Patent

CA 2243863

A gastrointestinal delivery system is provided. The system comprises a drug in combination with a core material, the core being surrounded by a water-insoluble or relatively water-insoluble coating material in which particulate water-insoluble material is embedded. When the delivery device enters the gastrointestinal tract, the particulate matter takes up liquid, thus forming channels interconnecting the drug-containing core with the outside of the delivery device. These channels allow the release of drug from the core into the gastrointestinal tract. By controlling parameters in the device, such as the core material, carrier material in the coating, and particulate matter, the location of release of the drug can be carefully controlled. Thus, the invention is also directed to a method of using the device for the treatment of disease by the release of drugs in the gastrointestinal tract in a location- and time-dependent manner.

Système d'administration pour le tube digestif, comportant un médicament associé à une matière de noyau, le noyau étant entouré d'une matière d'enrobage non hydrosoluble ou relativement peu hydrosoluble dans laquelle est noyée une matière particulaire non hydrosoluble. Lorsque le dispositif d'administration pénètre dans le tube digestif, la matière particulaire absorbe du liquide de manière à former des passages reliant le noyau renfermant le médicament à l'extérieur du dispositif d'administration. Ces passages permettent de libérer le médicament dans le tube digestif à partir du noyau. On peut déterminer avec précision l'endroit où le médicament sera libéré en modulant les paramètres du dispositif, à savoir, par exemple, la matière de noyau, la matière servant d'excipient dans l'enrobage, et la matière particulaire. On a également prévu un procédé pour la mise en oeuvre du dispositif dans le traitement des maladies par libération de médicaments dans le tube digestif, dans un endroit précis et à un instant précis.

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