Pentobarbital will lower the extent or result of fosamprenavir by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Check. pentobarbital will minimize the level or outcome of buprenorphine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Check. pentobarbital improves toxicity of ifosfamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. ... https://leonardov098kzp5.blogs100.com/profile