Patent ID: 6544252
Filing Date: 2003-04-08
Classification: A61K

Abstract:
An osmotic delivery system comprising:a capsule, said capsule having an interior for holding a beneficial agent, said interior having an interior surface said capsule including a cylindrical tube; an osmotic agent located in said interior; a semipermeable body in liquid communication with said capsule for permitting liquid to permeate through said semipermeable body to said osmotic agent; and a piston located within said interior of said capsule, being movable with respect to said interior surface of said capsule, defining a movable seal with said interior surface of said capsule that separates said osmotic agent from the beneficial agent, and having a recess that receives at least a portion of said osmotic agent, said osmotic agent located between said piston and said semipermeable body, said osmotic agent for imbibing liquid from a surrounding environment through said semipermeable body to cause said piston to move and in turn cause delivery of the beneficial agent from said capsule, wherein said cylindrical tube includes an opening and said semipermeale body includes a semipermeable plug, said semipermeable plug located within said opening.