Composition and method using solid-phase particles for sustained

Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Particulate form

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A61K 916, A61K 952

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active

059165979

ABSTRACT:
Composition for the sustained release of a biologically active agent in vivo. The composition comprises microcarriers containing a first solid-phase biocompatible material and a biologically active agent, wherein said microcarriers sustain the in vivo release of the biologically active agent. The composition also contains particles of a second biocompatible solid-phase material wherein the second solid-phase material further sustains the in vivo release of the biologically active agent.
The invention also relates to a method for sustaining effective serum levels of a biologically active agent in a subject, including forming an injectable dose containing an effective amount of a biologically active agent, wherein the agent is contained in a microcarrier, with a release-period sustaining amount of a solid-phase material. The method further includes administering the injectable dose to the subject.

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