A diltiazem pellet formulation for oral administration comprises a core of diltiazem or a pharmaceutically acceptable salt thereof in association with an organic acid, and a multi-layer membrane surrounding the core and containing a major proportion of a pharmaceutically acceptable film-forming, water...http://www.google.fr/patents/US5219621?utm_source=gb-gplus-shareBrevet US5219621 - Methods of treatment with diltiazem formulations
