Liquid delivery compositions
First Claim
1. A method for the in situ formation of a controlled release implant in or on a subject, comprising:
- administering to the subject a flowable composition, andallowing the flowable composition to contact a body fluid of the subject or an aqueous medium to form the controlled release said implant within or on the subject;
wherein,the flowable composition comprises an organic solvent in which is dissolved a thermoplastic polymer, and in which is suspended a multiplicity of solid microstructures incorporating an active agent;
the organic solvent is biocompatible, and has a solubility range of miscible to dispersible in the aqueous medium or the body fluid;
the thermoplastic polymer is biocompatible, biodegradable, soluble in the organic solvent, and insoluble in the aqueous medium or the body fluid;
the solid microstructures are insoluble in the organic solvent, the aqueous medium and the body fluid, and are composed of a biocompatible polymer which is biodegradable.
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Accused Products
Abstract
Improved biocompatible liquid delivery compositions, which are useful for the formation of sustained release delivery systems for active agents, are provided. The compositions include liquid formulations of a biocompatible polymer or prepolymer in combination with a controlled release component. The controlled release component includes an active agent. These compositions may be introduced into the body of a subject in liquid form which then solidify or cure in situ to form a controlled release implant or a film dressing. The liquid delivery compositions may also be employed ex situ to produce a controlled release implant. Methods of forming a controlled release implant and employing the liquid formulations in the treatment of a subject are also provided.
339 Citations
9 Claims
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1. A method for the in situ formation of a controlled release implant in or on a subject, comprising:
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administering to the subject a flowable composition, and allowing the flowable composition to contact a body fluid of the subject or an aqueous medium to form the controlled release said implant within or on the subject;
wherein,the flowable composition comprises an organic solvent in which is dissolved a thermoplastic polymer, and in which is suspended a multiplicity of solid microstructures incorporating an active agent; the organic solvent is biocompatible, and has a solubility range of miscible to dispersible in the aqueous medium or the body fluid; the thermoplastic polymer is biocompatible, biodegradable, soluble in the organic solvent, and insoluble in the aqueous medium or the body fluid; the solid microstructures are insoluble in the organic solvent, the aqueous medium and the body fluid, and are composed of a biocompatible polymer which is biodegradable. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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2. A method of treating a subject with an active agent, comprising:
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inserting into the subject a controlled release implant which is formed outside the subject by contacting a flowable composition with an aqueous medium;
wherein,the flowable composition comprises an organic solvent in which is dissolved a thermoplastic polymer and in which is suspended a multiplicity of solid microstructures incorporating an active agent; the organic solvent is biocompatible, and has a solubility range of miscible to dispersible in the aqueous medium; the thermoplastic polymer is biocompatible, biodegradable, soluble in the organic solvent, and insoluble in the aqueous medium and a body fluid of the subject; the solid microstructures are insoluble in the organic solvent, the aqueous medium and the body fluid, and are composed of a biocompatible polymer which is biodegradable.
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Specification