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Ferrous sulfate is an iron medicine that treats and prevents iron deficiency anaemia.
What should I know about Ferrous Sulfate?
It works best on an empty stomach, but can be taken with food if it upsets your stomach. Leave a 2-hour gap from tea, coffee, dairy and eggs. You may need a gap from other medicines too.
What are the side effects?
Feeling sick, constipation and diarrhoea can occur.
Who should check first?
See your doctor to find the cause of low iron. Check with a pharmacist about your other medicines.
When should I get help?
Keep iron medicines away from children. In Australia, in Australia, call the Poisons Information Centre on 13 11 26 if a child takes any.
Doses vary, so follow your prescriber, pharmacist and the medicine label. In Australia, call 000 in an emergency. Outside Australia, use your local emergency number.
Source: NHS: About ferrous sulfate. General education does not replace individual medical advice. Updated November 2026.
Explore our health guides and medicine FAQs. Medicine availability and product instructions vary by country; follow the leaflet supplied with your medicine.