Antibacterials: Iron and tetracyclines reduce the absorption of each other when administered concomitantly. Administration of iron preparations and tetracyclines should be separated by 2 to 3 hours.
Iron may reduce the absorption of quinolones. Administration of iron preparations and quinolones should be separated by at least 2 hours.
The absorption of ciprofloxacin, levofloxacin, norfloxacin and ofloxacin may be reduced by oral iron.
Chloramphenicol delays plasma iron clearance, incorporation of iron into red blood cells and interferes with erythropoiesis.
Antacids and mineral supplements: Compounds containing calcium, magnesium (including antacids and mineral supplements), bicarbonates, carbonates, oxalates or phosphates may impair the absorption of iron. Administration of iron preparations with such compounds should be separated by at least 2 hours.
Bisphosphonates: The absorption of bisphosphonates is reduced when taken concurrently with iron preparations. Administration should be separated by at least 2 hours.
Colestyramine: Absorption of iron is impaired by colestyramine.
Dimercaprol: Concomitant administration of oral iron preparations and dimercaprol should be avoided.
Dopaminergics: Oral iron preparations may reduce the absorption of dopaminergics such as co-careldopa, entacapone and levodopa.
Food Products: Absorption of iron is impaired by tea, eggs or milk.
Methyldopa: Oral iron preparations may antagonise the antihypertensive effect of methyldopa.
Mycophenolate mofetil: Oral iron preparations significantly reduce the absorption of mycophenolate mofetil.
Penicillamine: Oral iron preparations can reduce the absorption of penicillamine. Also the absorption of iron is impaired by penicillamine.
Thyroid hormone: Ferrous sulphate reduces the absorption of levothyroxine and so should be taken at least 2 hours apart.
Trientine: the absorption of oral iron preparations is reduced by trientine. Administration should be separated by at least 2 hours.
Zinc: Iron preparations and zinc preparations can reduce the absorption of each other.