IMPROVED DRUG DOSAGE FORM FOR CONTROLLED DELIVERY OF ONE OR MORE PHARMACEUTICALLY ACTIVE AGENT

摘要

Disclosed is an improved drug delivery system for controlled delivery of one or more pharmaceutical active agent using combination of hydrophobic and hydrophilic polymers in inner core and coating layer of a dosage form. The invention uses specific ratio of ethyl cellulose and hydroxypropyl methylcellulose for obtaining the desired release of active agent.