Abstract: An abuse resistant oral pharmaceutical composition, comprising: a barrier layer, comprising a first polymer; a diffusion layer, comprising a second polymer, substantially covering the barrier layer, wherein the diffusion layer is bonded to the barrier layer and comprises a drug that is substantially homogeneously distributed within the second polymer and diffuses from the diffusion layer within the gastrointestinal (GI) tract; and optionally an expansion layer comprising an expandable polymer, wherein the expansion layer is substantially covered by the barrier layer. Methods of making the same and methods of using the same are also provided.

Abstract: The present invention provides a method of achieving a novel Propafenone formulation, which will have reduced number dosings and improved bioavailability. The present invention also applies to the salt and active metabolites of the parent and pro-drug. The novel compositions are designed to release Propafenone after oral intake in a manner, which enables absorption to take place in the gastrointestinal tract so that a relatively fast peak plasma concentration of the active is obtained. The time-specific pharmaceutical formulation, the disintegration of which is triggered by time lapse and the pH of the environment to which it is subjected. The novel compositions are also designed for administration once or twice daily. i.e. a therapeutically effective concentration of Propafenone is maintained for a period of at least 10-20 hours.