Non-aqueous single phase vehicles and formulations utilizing such vehicles
First Claim
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1. A method for reducing the level of peroxide present in a biocompatible polymer and forming a drug delivery formulation, said method comprising:
- solubilizing the biocompatible polymer in water to form an aqueous solution, wherein the biocompatible polymer is water soluble;
combining methionine with the aqueous solution comprising the biocompatible polymer to obtain a polymer preparation having a reduced level of peroxide;
removing substantially all of the water from the polymer preparation;
combining the polymer preparation with a solvent to form a drug delivery vehicle solution;
combining the drug delivery vehicle solution with a drug to form a drug delivery formulation comprising the drug suspended in the drug delivery vehicle solution and wherein the drug delivery formulation is nonaqueous.
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Abstract
The present invention is related to materials and methods for forming polymeric delivery vehicles that reduces risk of oxidative degradation of a carried drug and the resulting compositions.
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Citations
19 Claims
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1. A method for reducing the level of peroxide present in a biocompatible polymer and forming a drug delivery formulation, said method comprising:
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solubilizing the biocompatible polymer in water to form an aqueous solution, wherein the biocompatible polymer is water soluble; combining methionine with the aqueous solution comprising the biocompatible polymer to obtain a polymer preparation having a reduced level of peroxide; removing substantially all of the water from the polymer preparation; combining the polymer preparation with a solvent to form a drug delivery vehicle solution; combining the drug delivery vehicle solution with a drug to form a drug delivery formulation comprising the drug suspended in the drug delivery vehicle solution and wherein the drug delivery formulation is nonaqueous. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification