Pentobarbital improves toxicity of methoxyflurane by increasing metabolism. Contraindicated. Greater metabolism of methoxyflurane to nephrotoxic compounds. pentobarbital will reduce the level or impact of fosamprenavir by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Watch. pentobarbital will increase toxicity of buprenorphine, prolonged-acting injection by phar... https://isnembutallegalinusa16050.blogzet.com/the-basic-principles-of-what-type-of-drug-is-nembutal-45905438