Keep track of Closely (one)oxcarbazepine will lessen the level or effect of fentanyl by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Keep track of Intently. Coadministration of fentanyl with CYP3A4 inducers could lead on to your lessen in fentanyl plasma concentrations, insufficient efficacy or, maybe, improvement of a with… Read More