Patent ID: 7927624
Filing Date: 2011-04-19
Classification: A61K,A61P

Abstract:
1. A multi-layer controlled release tablet, consisting of: (a) one active layer which consists of:  wherein the weight ratio of the hydrophilic polymeric substances to the lipophilic substances contained in said active layer is in the range of 7:1 to 1:1, and in which said hydrophilic polymeric substances (ii) are contained in a percentage between 30% and 75% of the weight of the active layer, and (b) one or more barrier layers which limit the release surface of the active layer, which barrier layers contain one or more of: hydrophilic polymeric substances which swell and/or gel and/or erode upon contact with aqueous liquids, lipophilic substances and adjuvant substances; which tablet is optionally coated.