Digitalis and quinidine.
D004074:Digitoxin / Q000008:administration & dosage / Q000378:metabolism; D004077:Digoxin / Q000008:administration & dosage* / Q000378:metabolism; D004347:Drug Interactions; D004359:Drug Therapy, Combination; D006801:Humans; D007700:Kinetics; D011802:Quinidine / Q000008:administration & dosage*
D004077:Digoxin; D004074:Digitoxin; D011802:Quinidine