title: Reduction of bioavailability of verapamil by rifampin.
mesh_terms: D001682:Biological Availability; D004347:Drug Interactions; D006801:Humans; D012293:Rifampin / Q000494:pharmacology*; D014700:Verapamil / Q000378:metabolism*
chemical_list: D014700:Verapamil; D012293:Rifampin