A system for the controlled release of active ingredients

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/22 (2006.01) A61K 9/20 (2006.01) A61K 9/28 (2006.01)

Patent

CA 2478514

A new release system is disclosed for releasing one or more active substances vehicularised in it, at a predetermined rate and duration. The system is constituted by a pharmaceutical tablet, coated with a film of polymeric material impermeable and insoluble in aqueous fluids; on the coating film, one or more apertures of geometrically precise size and shape are made, through the use of a laser beam of appropriate power and intensity, in a way such that the active ingredient contained in the therapeutic system is released only from the non coated portion of the tablet surface at the desired rate and time. The technology for manufacturing such system is also described.

L'invention concerne un nouveau système de libération prolongée conçu pour permettre la libération d'une ou de plusieurs substances actives contenues dans ledit système à une vitesse et sur un laps de temps prédéterminés. Le système décrit dans cette invention comprend un comprimé pharmaceutique enrobé d'une pellicule d'un matériau polymère imperméable et insoluble dans des fluides aqueux. La pellicule d'enrobage présente une ou plusieurs ouvertures de forme et de taille géométriquement précises, lesquelles ouvertures sont pratiquées à l'aide d'un faisceau laser de puissance et d'intensité adaptées, de telle sorte que le principe actif contenu dans le système thérapeutique soit libéré uniquement à partir de la portion non enrobée de la surface du comprimé, à une vitesse et sur un laps de temps souhaités. Cette invention concerne également un procédé permettant de fabriquer un tel système.

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