A sustained release pharmaceutical formulation and methods of making and using the same are provided. The sustained release pharmaceutical formulation includes a sustained release excipient including a gelling agent, an inert pharmaceutical diluent, an optional hydrophobic material and/or hydrophobic...http://www.google.fr/patents/US5662933?utm_source=gb-gplus-shareBrevet US5662933 - Controlled release formulation (albuterol)
