Vit C: Deferroxamine, hormonal contraceptives, flufenazine, warfarin, elemental iron, salicylates, warfarin, fluphenazine, disulfiram, mexiletine, vitamin B12.
Vit E: Colestyramine, colestipol, and orlistat may interfere with vitamin E absorption. High doses of vitamin E potentiates the anticoagulant action of warfarin. Large doses of vitamin E may impair response to iron supplementation.