Oral Iron Salts

Oral iron salts are medicines taken by mouth to replace iron when the body needs more.

Iron is needed to make haemoglobin, the part of red blood cells that carries oxygen. A clinician may recommend an oral product when low iron is identified or when there is a clear reason to replenish iron stores. Products differ in the iron salt they contain and in the amount supplied per dose.

The body absorbs only part of an oral dose, and food, drinks, and other medicines can affect that process. Tea, coffee, calcium-containing products, and some indigestion medicines may reduce absorption when taken close together. Iron commonly causes darker stools. Constipation, nausea, stomach discomfort, or diarrhoea can also occur and may affect which product or schedule is practical.

Oral iron is used in iron supplementation plans, alongside finding and addressing the reason iron became low. Causes can include dietary intake, blood loss, reduced absorption, or increased need at certain life stages. Follow-up may include checking symptoms and blood tests, so the clinician can judge whether the plan is working and whether further assessment is needed.

A different oral formulation may suit someone who finds one product difficult to tolerate. Dietary advice can support iron intake but may not replace prescribed treatment. In some circumstances, a clinician may consider iron given by another route, especially when oral treatment is unsuitable or absorption is a concern.

Take oral iron exactly as prescribed or stated on the label; do not double a missed dose. Ask a pharmacist about spacing it from other medicines and about the best way to take the particular product. Contact the prescriber if digestive effects persist, if you cannot take the medicine as planned, or if symptoms such as worsening breathlessness, chest discomfort, or fainting occur.

Keep iron medicines out of reach of children, as accidental ingestion can be dangerous. Tell your clinician about digestive disease, pregnancy, other supplements, and regular medicines. Dark stools can be expected with iron, but black tarry stools, visible blood, severe abdominal pain, or vomiting blood need urgent medical assessment.