pentobarbital will decrease the level or impact of cilostazol by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep an eye on.pentobarbital decreases levels of elvitegravir/cobicistat/emtricitabine/tenofovir DF by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. May lead to loss of virologic reaction an