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Rate controlled dispenser for administering beneficial agent

  • US 4,684,524 A
  • Filed: 08/08/1985
  • Issued: 08/04/1987
  • Est. Priority Date: 03/19/1984
  • Status: Expired due to Term
First Claim
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1. A dispenser for delivering avermectin to an environment of use, the dispenser comprising:

  • (a) wall means for surrounding and forming a compartment, which compartment comprises;

    (1) lipophilic means for absorbing thermal energy from the enviroment of use;

    (2) a beneficially effective amount of avermectin present in the means for absorbing thermal energy;

    (3) osmotically active means for mixing with an aqueous fluid present in the environment of use that enters the compartment for increasing the aqueous solution volume in the compartment; and

    ,(b) means in the wall for delivering avermectin from the dispenser to the environment of use over time.

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