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Methods for the preparation of pharmaceutically active agents for in vivo delivery

  • US 5,665,382 A
  • Filed: 06/07/1995
  • Issued: 09/09/1997
  • Est. Priority Date: 02/22/1993
  • Status: Expired due to Term
First Claim
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1. A method for the preparation of pharmaceutically active agents for in vivo delivery, said method comprising subjecting aqueous medium containing biocompatible material capable of being crosslinked by disulfide bonds and a pharmaceutically active agent to high intensity ultrasound conditions for a time sufficient to promote crosslinking of said biocompatible material by disulfide bonds;

  • wherein said pharmaceutically active agent issubstantially completely contained within a polymeric shell, andwherein the largest cross-sectional dimension of said shell is no greater than about 10 microns.

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