Method for dry powder coating osmotic drug delivery system

Abstract

The present disclosure provides a process of producing a dry powder coated solid, oral administered pharmaceutical osmotic drug delivery system. The method includes preparing a dry powder film forming polymer coating composition to be coated onto an outer surface of the cores, a size of the coating powder being in a range from about 1 nm to about 500 μm. The osmotic drug delivery cores are placed into an interior of a rotatable housing and the cores may be preheated. The dry powder coating composition is sprayed into the interior of the housing while the housing is rotating to produce a uniform coating of the dry powder coating composition on the outer surface of the cores. The coated cores are cured form a substantially uniform cured film after which one or more orifices are produced through the uniform cured film to expose the outer surface of the cores at a position of each of the one or more orifices.

Dependencies are inferred from the claim text.