pentobarbital will lessen the extent or impact of fesoterodine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep track of.pentobarbital will lower the level or result of donepezil by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Slight/Significance Unfamiliar.pentobarbital will minimize the extent or effect of etra