Ph sensitive matrix formulation

A - Human Necessities – 61 – K

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Details

A61K 9/20 (2006.01) A61K 31/155 (2006.01)

Patent

CA 2673111

The present invention provides formulations of therapeutic agents that benefit from a prolonged time of controlled release in the stomach and upper gastrointestinal (GI) tract, and from an enhanced drug exposure to the upper GI tract. The formulations of the invention comprise a therapeutic agent and one or more pH sensitive polymers that are designed for accelerated hydration, expansion, disintegration and dissolution at the higher pH of the upper GI tract, thereby, ensuring that any therapeutic agent that has not been released in the stomach is released in the upper GI tract, thus maximizing absorption of therapeutic agent that has a window of absorption located at the upper GI tract.

La présente invention concerne des formulations d'agents thérapeutiques qui présentent avantageusement une longue durée de libération contrôlée dans l'estomac et dans le tube digestif supérieur ainsi qu'une meilleure exposition du tube digestif supérieur aux médicaments. L'invention concerne des formulations qui comprennent un agent thérapeutique et un ou plusieurs polymères sensibles au pH qui sont conçus pour s'hydrater, gonfler, se désintégrer et se dissoudre de manière accélérée au pH le plus élevé du tube digestif supérieur, ce qui garantit que tout agent thérapeutique qui n'a pas été libéré dans l'estomac est libéré dans le tube digestif supérieur. Par conséquent, l'absorption d'un agent thérapeutique qui présente une fenêtre d'absorption située au niveau du tube digestif supérieur est maximisée.

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