Pentobarbital will lower the level or influence of saxagliptin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Insignificant/Significance Unknown. pentobarbital will lessen the level or influence of fesoterodine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Observe. Contraindicated. Coadministration of doravirine with a solid CYP3A inducer might lower... https://williamj012wog3.wssblogs.com/profile