pentobarbital will reduce the level or outcome of atazanavir by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Slight/Significance Unidentified.pentobarbital will decrease the extent or effect of ombitasvir/paritaprevir/ritonavir & dasabuvir (DSC) by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Powerful CYP3A4 i