glycerol phenylbutyrate will reduce the level or influence of triazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Check. Glycerol phenylbutyrate is actually a weak inducer of CYP3A4. Keep track of for lowered efficacy of CYP3A4 substrates that have a slender therapeutic index.In one-night time, double-blind, parallel-gro