Drug delivery system
AssigneeBayer Aktiengesellschaft
InventorsHeíkkí Lyytikäinen, Harri Jukarainen
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Abstract
The present invention provides a novel drug delivery system for the controlled release of therapeutically active substances at a predetermined, essentially constant release rate over a prolonged period of time. The delivery system comprises at least one core comprising said therapeutically active substance(s), at least one membrane encasing the core and an intermediary layer of a substantially inert material, wherein the intermediary layer is applied between the core and the membrane or between two membrane layers.
Claims5
A drug delivery system comprising at least one core comprising one or more therapeutically active substance(s) and at least one membrane encasing the core, characterized in that the system further comprises an intermediary layer of a substantially inert material that is not covalently bound to the material of the core or the membrane(s) and wherein the substantially inert material is selected from the group consisting of silica, fumed and precipitated silicas and talc.
Dependencies are inferred from the claim text.