Compositions and methods comprising erythrohydroxybupropion and related compounds for improving the efficacy of dextromethorphan
First Claim
1. A method of increasing dextromethorphan plasma levels in a human being that is an extensive metabolizer of dextromethorphan in need of treatment with dextromethorphan, comprising co-administering a) erythrohydroxybupropion or bupropion with b) dextromethorphan to the human being once or twice a day for at least eight consecutive days, wherein the daily dose of dextromethorphan is about 40 mg to about 600 mg, and co-administering erythrohydroxybupropion or bupropion with dextromethorphan results in an AUC0-12 of dextromethorphan that, on the eighth day, is at least about 20 times the AUC0-12 that would be achieved by administering the same amount of dextromethorphan without erythrohydroxybupropion or bupropion for eight consecutive days.
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Abstract
This disclosure relates to methods of improving the efficacy of dextromethorphan, or providing beneficial pharmacokinetic effects to dextromethorphan, comprising co-administering erythrohydroxybupropion, or a prodrug thereof, and dextromethorphan to a human being. Dosage forms, drug delivery systems, and methods related to dextromethorphan and erythrohydroxybupropion or a prodrug of erythrohydroxybupropion are also disclosed.
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Citations
27 Claims
- 1. A method of increasing dextromethorphan plasma levels in a human being that is an extensive metabolizer of dextromethorphan in need of treatment with dextromethorphan, comprising co-administering a) erythrohydroxybupropion or bupropion with b) dextromethorphan to the human being once or twice a day for at least eight consecutive days, wherein the daily dose of dextromethorphan is about 40 mg to about 600 mg, and co-administering erythrohydroxybupropion or bupropion with dextromethorphan results in an AUC0-12 of dextromethorphan that, on the eighth day, is at least about 20 times the AUC0-12 that would be achieved by administering the same amount of dextromethorphan without erythrohydroxybupropion or bupropion for eight consecutive days.
Specification