pentobarbital will decrease the extent or outcome of ambrisentan by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Slight/Significance Unknown.pentobarbital will reduce the extent or impact of etonogestrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Check.Labor and delivery: Hypnotic doses of such barbiturates usua… Read More