pentobarbital will decrease the level or impact of etonogestrel by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep track of.pentobarbital will reduce the extent or outcome of ombitasvir/paritaprevir/ritonavir & dasabuvir (DSC) by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Powerful CYP3A4 induce