This document does not contain all possible drug interactions. Do not start, stop, or change the dosage of any medicines without your doctor’s approval. Belladonna alkaloids, umeclidinium bromide/vilanterol inhaled.
Phenobarbital decreases levels of folic acid by inhibition of GI absorption. Fluconazolephenobarbital decreases levels of fluconazole by inhibition of GI absorption. Galantaminegalantamine decreases effects of belladonna alkaloids by pharmacodynamic antagonism. Donepezil decreases effects of belladonna alkaloids by pharmacodynamic antagonism. Cyanocobalaminphenobarbital decreases levels of cyanocobalamin by inhibition of GI absorption. Clotrimazolephenobarbital decreases levels of clotrimazole by inhibition of GI absorption.
Phenobarbital will decrease the level or effect of tamoxifen by affecting hepatic enzyme CYP2C9/10 metabolism. Phenobarbital will decrease the level or effect of tacrolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Phenobarbital will decrease the level or effect of sunitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Phenobarbital will decrease the level or effect of sulfamethoxazole by affecting hepatic enzyme CYP2C9/10 metabolism.
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Kavakava increases effects of phenobarbital by pharmacodynamic synergism. Ixabepilonephenobarbital will decrease the level or effect of ixabepilone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Ivermectinphenobarbital will decrease the level or effect of ivermectin by P-glycoprotein efflux transporter. Itraconazolephenobarbital 13 folk remedies from around the world that really work will decrease the level or effect of itraconazole by P-glycoprotein efflux transporter. Phenobarbital will decrease the level or effect of indinavir by P-glycoprotein efflux transporter. Indinavirphenobarbital will decrease the level or effect of indinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism.
Physostigminephysostigmine increases and belladonna alkaloids decreases cholinergic effects/transmission. Ondansetronphenobarbital will decrease the level or effect of ondansetron by affecting hepatic/intestinal enzyme CYP3A4 metabolism. No dosage adjustment for ondansetron is recommended for patients on these drugs. Neostigmineneostigmine increases and belladonna alkaloids decreases cholinergic effects/transmission.
