Sustained delivery of an active agent using an implantable system
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United States of America Patent
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Sep 17, 2013
Grant Date -
Feb 7, 2013
app pub date -
Oct 4, 2012
filing date -
Feb 2, 1996
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Abstract
The invention is directed to a device for delivering an active agent formulation for a predetermined administration period. An impermeable reservoir is divided into a water-swellable agent chamber and an active agent formulation chamber. Fluid from the environment is imbibed through a semipermeable plug into the water-swellable agent chamber and the active agent formulation is released through a back-diffusion regulating outlet. Delivery periods of up to 2 years are achieved.
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