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Injection vehicle for polymer-based formulations

  • US 7,582,311 B1
  • Filed: 10/13/2000
  • Issued: 09/01/2009
  • Est. Priority Date: 10/15/1999
  • Status: Active Grant
First Claim
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1. A method for administering a biologically active agent, the method comprising:

  • injecting to an animal a formulation comprising;

    (a) an injection vehicle comprising hyaluronic acid or sodium hyaluronate dissolved in a physiological buffer at a concentration of about 0.01 to about 3 percent weight per volume; and

    (b) particles comprising;

    (i) a first component that is the biologically active agent; and

    (ii) a second component that is a biocompatible polymeric matrix,wherein the concentration of the particles is about 100 mg/mL to about 500 mg/mL of the formulation, and further wherein the hyaluronic acid or sodium hyaluronate is at a concentration sufficient to inject the formulation through a 23-gauge or smaller bore needle.

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