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First received: March 03, 2023

Clinical Trial: Interaction of CYP2B6 Genotype and Efavirenz With Methadone and Tizanidine PK

Study Status: Completed

Recruit Status: RECRUITING

Condition: Drug-Drug Interaction

Study Type: INTERVENTIONAL


Official Title: Effect of CYP2B6 Genotype and Efavirenz on the Disposition and Pharmacodynamic of Methadone and Tizanidine in Healthy Volunteers

Brief Summary: The main goal of this clinical study is to test how CYP2B6 genetic variations and efavirenz (cornerstone in HIV-1 therapy) dictate the disposition (PK) of CYP2B6 substrate (methadone) and PK and effect (PD) of CYP1A2 substrate (tizanidine).Specifically, the investigators will test whether efavirenz produces CYP2B6 genotype dependent unanticipated DDIs with CYP2B6 (methadone) and CYP1A2 (tizanidine), leading to lack of efficacy or increased toxicity.Healthy volunteers genotyped for CYP2B6*6 and *18 alleles will be…

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