The release of pseudoephedrine hydrochloride from beadlets coated with different levels of Eudragit S-100 and Eudragit RS was studied. In vitro dissolution studies indicated that the coating levels types of resins and types of plasticizers in the film played a major role in determining drug release rate profiles. Drug release appeared to follow first order kinetics. A coating of 2% Eudragit S-100 eliminated the formation of soft lumps which are commonly seen with Eudragit RS coated beadlets. Eudragit S-100 coating also contributed to retarding drug release in dissolution media at pH 1.2-6.5. It was concluded that pseudoephedrine release from coated beadlets depended on coating levels types of resins and types of plasticizers used. /Pseudoephedrine hydrochloride