Injectable depot gel composition and method of preparing the composition
First Claim
1. An injectable depot gel composition comprising:
- a continuous, viscous gel phase comprising a biocompatible polymer and an organic solvent that dissolves the biocompatible polymer and forms a viscous gel;
a beneficial agent; and
a separate, droplet phase dispersed in the viscous gel phase comprising an emulsifying agent, whereby the depot gel composition is thixotropic.
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Accused Products
Abstract
An injectable depot gel composition containing a polymer, a solvent that can dissolve the polymer and thereby form a viscous gel, a beneficial agent; and an emulsifying agent in the form of a dispersed droplet phase in the viscous gel. The injectable depot gel composition can be prepared by mixing the polymer and the solvent so that the solvent dissolves the polymer and forms a viscous gel. The beneficial agent is dissolved or dispersed in the viscous gel and the emulsifying agent is mixed with the beneficial agent containing viscous gel. The emulsifying agent forms a dispersed droplet phase in the viscous gel to provide the injectable depot gel composition. The injectable depot gel composition can deliver a beneficial agent to a human or animal with a desired release profile.
354 Citations
27 Claims
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1. An injectable depot gel composition comprising:
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a continuous, viscous gel phase comprising a biocompatible polymer and an organic solvent that dissolves the biocompatible polymer and forms a viscous gel;
a beneficial agent; and
a separate, droplet phase dispersed in the viscous gel phase comprisingan emulsifying agent, whereby the depot gel composition is thixotropic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of preparing an injectable depot gel composition comprising:
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A) mixing a biocompatible polymer and an organic solvent whereby the solvent dissolves the polymer and forms a viscous gel as a continuous phase;
B) dispersing or dissolving a beneficial agent in the viscous gel to form a beneficial agent containing viscous gel; and
C) mixing an emulsifying agent with the beneficial agent containing viscous gel, thereby forming a separate, dispersed droplet phase of the emulsifying agent in the beneficial agent containing viscous gel to provide a thixotropic injectable depot gel composition.
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25. A method of preparing an injectable depot gel composition comprising:
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A) mixing a biocompatible polymer and an organic solvent whereby the solvent dissolves the polymer to form a viscous gel as a continuous phase;
B) dispersing or dissolving a beneficial agent in an emulsifying agent to form a beneficial agent containing emulsifying agent; and
C) mixing the beneficial agent containing emulsifying agent with the viscous gel to form a separate, dispersed droplet phase of the beneficial agent containing emulsifying agent in the viscous gel and provide a thixotropic injectable depot gel composition.
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26. An injectable depot gel composition comprising:
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a continuous, viscous, gel phase comprising a biocompatible polymer and an organic solvent that dissolves the polymer and forms a viscous gel; and
a separate, droplet phase dispersed in the viscous gel phase comprisingan emulsifying agent, whereby the depot gel composition is thixotropic.
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27. A kit adapted to provide a thixotropic injectable depot composition having a continuous phase formed as a viscous polymer-solvent gel in which an emulsifying agent is present in the form of a dispersed droplet phase, comprising as kit components:
- (a) a biocompatible polymer and an organic solvent that dissolves the polymer and forms a viscous gel;
(b) emulsifying agent; and
(c) beneficial agent dispersible or dissolvable in the emulsifying agent.
- (a) a biocompatible polymer and an organic solvent that dissolves the polymer and forms a viscous gel;
Specification