BigPatents India

The present invention discloses novel multiplying porous osmotic and diffusion drug delivery system, wherein the system comprises of a) a homogenous core which further comprises of, i) water soluble medicament (s), ii) suitable binder (s), iii) optionally, diluent (s), iv) optionally, water soluble osmotic agent (s), v) optionally, nonswellable solubilizing agent(s), vi) optionally, buffering agent(s), vii) optionally, crystal habit modifier(s) b) a membrane coating which covers the core formulation, which further comprises of, i) a water insoluble and semipermeable pharmaceutically acceptable polymer, ii) singe or mixture of water soluble polymers which are capable of forming gel initially and then dissolves or erodes slowly, iii) single or mixture of plasticizers.