phenobarbital will reduce the level or effect of diazepam buccal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep track of. Sturdy or reasonable CYP3A4 inducers might improve level of diazepam elimination; for that reason, efficacy of diazepam could be reduced.Check Intently (one)phenobarbital will lessen the level or resu