Treatment Methods with Low-Dose, Longer-Acting Formulations of Local Anesthetics and Other Agents
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Abstract
Drug formulations that provide sustained action and/or reduced dosage requirements are provided. In the formulations the drugs (particularly local anesthetics) are associated with reversed cubic phase and reversed hexagonal phase lyotropic liquid crystalline material.
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Citations
156 Claims
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1-145. -145. (canceled)
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146. A local anesthetic formulation having prolonged duration of action for a given dose, comprising:
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a local anesthetic selected from the group consisting of bupivacaine and ropivacaine at a given dose; microparticles of reversed cubic or reversed hexagonal lyotropic liquid crystalline phase material or combinations thereof ; and a polar solvent, wherein said microparticles are dispersed in said polar solvent, wherein said local anesthetic is solubilized in said microparticles, wherein said given dose of said local anesthetic has a first duration of action in the absence of said microparticles and said polar solvent, and has a second duration of action which is greater than said first duration of action when said local anesthetic is solubilized in said microparticles and said microparticles are dispersed in said polar solvent. - View Dependent Claims (147, 148, 149, 150, 151, 152, 153, 155, 156)
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154. A method of providing prolonged anesthesia to a subject, comprising administering to said subject a local anesthetic formulation having
a local anesthetic selected from the group consisting of bupivacaine and ropivacaine at a given dose; -
microparticles of reversed cubic or reversed hexagonal lyotropic liquid crystalline phase material or combinations thereof ; and a polar solvent, wherein said microparticles are dispersed in said polar solvent, wherein said local anesthetic is solubilized in said microparticles, wherein said given dose of said local anesthetic has a first duration of action in the absence of said microparticles and said polar solvent, and has a second duration of action which is greater than said first duration of action when said local anesthetic is solubilized in said microparticles and said microparticles are dispersed in said polar solvent.
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Specification