Vit C: Desferrioxamine, cyclosporine, disulfiram, warfarin. Food may cause Fe overload in individuals w/ hereditary hemochromatosis & in those heterozygous to this. Lab tests interfere w/ the analyses of glucose, creatinine, carbamazepine, uric acid & inorganic phosphates in urine, serum & of occult blood in feces; tests that measure urinary & blood glucose levels. Vit B
6: Levodopa decreases its effect but not when carbidopa is combined w/ levodopa. Lab tests causes a false +ve result in spot w/ Ehrlich's reagent similar to vit B
1.