Why are oral iron salts used in iron supplementation?

Iron is needed to make haemoglobin, the part of red blood cells that carries oxygen. Low iron may be found during assessment of tiredness, reduced exercise tolerance, dizziness, paleness, or other concerns, but these symptoms can have many causes. A clinician may use blood tests and your history to establish whether iron deficiency is present and why it developed.

Different iron salts contain iron in forms the gut can absorb. Replacing iron is only part of care: the underlying reason for low iron may also need attention, such as dietary intake, blood loss, absorption problems, or increased requirements during particular stages of life.

Take oral iron exactly as prescribed or directed. Ask whether it should be taken with food, since food may make it easier on the stomach but can affect absorption for some products. Tea, coffee, calcium-containing products, antacids, and certain medicines can interfere with absorption, so ask a pharmacist about spacing doses.

Nausea, stomach discomfort, constipation, diarrhoea, and darker stools can occur. Do not take more than advised and keep iron products out of reach of children, because an accidental overdose can be dangerous. Oral Iron Salts gives more product-focused information, and Iron Supplementation explains the treatment plan.

Get urgent medical help if a child or adult may have taken too much iron. Seek urgent assessment for black tar-like stools, vomiting blood, severe chest pain, fainting, or severe shortness of breath. Contact your clinician if side effects make it hard to continue, symptoms worsen, or you have not discussed the cause of suspected low iron.

Ask which iron salt and dose are appropriate, how to fit it around your food and other medicines, and when your response should be reviewed. Ask what tests or investigations are needed to identify the reason your iron is low rather than simply continuing supplements.