title: Phenytoin-theophylline-quinidine interaction.
mesh_terms: D000328:Adult; D000368:Aged; D004347:Drug Interactions; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010672:Phenytoin / Q000494:pharmacology*; D011802:Quinidine / Q000494:pharmacology*; D013806:Theophylline / Q000494:pharmacology*
chemical_list: D010672:Phenytoin; D013806:Theophylline; D011802:Quinidine