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Osmotic delivery system and method for enhancing start-up and performance of osmotic delivery systems

  • US 6,132,420 A
  • Filed: 11/14/1997
  • Issued: 10/17/2000
  • Est. Priority Date: 02/02/1996
  • Status: Expired due to Term
First Claim
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1. An osmotic drug delivery device comprising:

  • a capsule including a first chamber containing a beneficial agent and a second chamber containing an osmotic agent, said first chamber having an opening through which the beneficial agent may be delivered from the first chamber to a location external of the first chamber;

    a movable separating member positioned in the capsule between the first chamber and the second chamber;

    a wall of the second chamber including a fluid permeable portion allowing fluid to pass from a surrounding environment into the second chamber; and

    an incompressible fluid additive located within the second chamber and substantially surrounding the osmotic agent.

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