Ritonavir or lopinavir/ritonavir considerably increase plasma concentrations of oxycodone in healthful human volunteers resulting from inhibition of CYP3A4 and CYP2D6.[fifty eight] Rifampicin drastically reduces plasma concentrations of oxycodone because of sturdy induction of CYP3A4.In advance of getting PERCOCET, convey to your Health care compan