A dispenser is disclosed for delivering a beneficial agent to an environment of use. The dispenser comprises a semipermeable wall surrounding a compartment containing a heat responsive composition, and an expandable composition. A passageway in the wall connects the compartment with the exterior of the...http://www.google.es/patents/US4716031?utm_source=gb-gplus-sharePatente US4716031 - Drug dispenser comprising a multiplicity of members acting together for successfully dispensing drug
Drug dispenser comprising a multiplicity of members acting together for ...
