glycerol phenylbutyrate will reduce the level or influence of triazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Keep track of. Glycerol phenylbutyrate is a weak inducer of CYP3A4. Check for decreased efficacy of CYP3A4 substrates that have a narrow therapeutic index.Equally outpatient studies and a sleep laboratory stu… Read More