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.