pentobarbital will decrease the level or influence of ritonavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Keep an eye on.pentobarbital will reduce the level or impact of brexpiprazole by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Check Intently. Double brexpiprazole dose above 1-2 weeks if admi