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Device for delivery of useful agent

  • US 4,014,987 A
  • Filed: 06/30/1975
  • Issued: 03/29/1977
  • Est. Priority Date: 06/04/1974
  • Status: Expired due to Term
First Claim
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1. A device for the controlled local administration of drug to the vagina comprising a matrix or hollow body made of drug release rate controlling material formed of a hydrophobic poly(acid) represented by the formula:

  • ##STR15## wherein the R'"'"'s are organic radicals independently selected to provide on the average from 8 to 22 total carbon atoms for each carboxylic hydrogen, said body of drug release rate controlling material containing a vaginally acceptable drug dispersed therethrough, the device shaped and adapted for insertion and placement in the vagina, and wherein the release rate controlling material erodes at a controlled rate over a prolonged period of time when the device is in the vagina in response to the environment of the vagina, thereby releasing the dispersed drug to the vagina at a controlled rate over a prolonged period of time.

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