just how long does Nembutal last? how much time will it choose to get the full impact of Nembutal? numerous various factors can impact the duration of pentobarbital will lessen the level or effect of ombitasvir/paritaprevir/ritonavir & dasabuvir (DSC) by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. sturdy CYP3A4 inducers