Vit C: Concurrent intake of ascorbic acid >200 mg per elemental Fe 300 mg would increase intestinal absorption of Fe. Increased urinary excretion of ascorbic acid & decreased excretion of aspirin occur when taken together. Prolonged presence of paracetamol in the blood. Not compatible in soln w/ aminophylline, bleomycin, erythromycin, lactobionate, nafcillin, Na nitrofurantoin, conjugated estrogens, Na bicarbonate, sulfafurazole, diethanolamine, chloramphenicol Na succinate, chlorothiazide Na & hydrocortisone Na succinate. Reports of interference w/ blood-thinning treatments. Zn: Interactions w/ cephalosporins, β-lactam antibiotics, tetracyclines, antiretroviral drugs (eg, atazanavir, ritonavir), antineoplastic agents (eg, cisplatin), antidiabetic drugs (eg, glimepiride, glyburide, pioglitazone, insulin) & K-sparing diuretics (eg, amiloride). Concomitant use w/ food, alcohol, or tobacco. Vit D
3: Avoid taking w/ paricalcitol, calcipotriene, doxercalciferol, mineral oil, orlistat, bile acid sequestrants (eg, colesevelam, colestipol, cholestyramine). Absorption can be decreased or prevented w/ orlistat, or bile acid sequestrants (eg, colesevelam, colestipol, cholestyramine). Caution w/ digoxin, Al hydroxide, water pills (eg, chlorthalidone, hydrochlorothiazide & chlorothiazide), Mg hydroxide & Mg citrate, fosphenytoin.