Ferrous fumarate tablets are a high-strength iron supplements used to treat and prevent iron deficiency anaemia. Iron is vital for the production of healthy red blood cells and haemoglobin.
What is Ferrous Fumarate 322mg?
Each film-coated tablet contains 322mg of ferrous fumarate, providing approximately 106mg of elemental iron. This is one of the strongest over-the-counter iron supplements available in the UK and is the exact strength commonly prescribed by the NHS.
- 322mg ferrous fumarate per tablet
- Film-coated for easier swallowing
- 28 tablets per pack
- Brands may vary (generic equivalent)
Why Choose This Iron Supplement?
- High elemental iron content for faster results
- Trusted treatment for iron deficiency anaemia
- Once-daily dose for most adults
- Gentle film-coated formula
Understanding Iron Deficiency Anaemia
When the body lacks sufficient iron, it cannot produce enough healthy red blood cells. This leads to symptoms such as fatigue, shortness of breath, pale skin, headaches, and dizziness. This supplement helps replenish iron stores and supports normal energy levels and oxygen transport. For more information, visit the NHS page on iron deficiency anaemia.
How to Take Ferrous Fumarate Tablets
Adults: Take one tablet daily, or as directed by your doctor. In more severe cases, your doctor may recommend one tablet twice daily.
- Swallow with a full glass of water
- Can be taken with food if it upsets your stomach
- Avoid tea, coffee, eggs, milk or dairy products for 1 hour before or 2 hours after (these reduce absorption)
- Taking with orange juice or vitamin C supplements can improve uptake
Possible Side Effects
Common side effects of iron supplements include constipation, diarrhoea, stomach discomfort, or darkened stools. These effects are usually mild and improve as your body adjusts. Speak to your pharmacist or GP if they persist.
Important Safety Information
- Keep out of the sight and reach of children – iron overdose can be fatal in young children.
- Not suitable for children unless advised by a doctor.
- Consult your doctor if you are pregnant, breastfeeding, or taking other medication.
- Always read the Patient Information Leaflet supplied with the medicine.
Ingredients
Each tablet contains 322mg Ferrous Fumarate (equivalent to approx. 106mg elemental iron). Full list of excipients is in the Patient Information Leaflet.
Ferrous Fumarate vs Other Iron Supplements – Comparison Table
| Feature | Ferrous Fumarate 322mg | Ferrous Sulfate 200mg | Ferrous Gluconate |
|---|---|---|---|
| Elemental Iron per tablet | 106mg | ~65mg | ~35mg |
| Gentleness on stomach | Good | Moderate | Best |
| Typical daily dose | 1 tablet | 1–2 tablets | 2–3 tablets |
| Commonly prescribed by NHS | Yes | Yes | Less common |
This comparison shows why many people and doctors prefer ferrous fumarate when higher iron levels are needed quickly.
How It Compares to Other Iron Supplements
Many people ask how this compares to ferrous sulfate. Ferrous fumarate generally provides higher elemental iron per tablet and is often gentler on the stomach than other iron supplements.
Why Buy from Live Well Nationwide?
- Competitive price from only £1.90
- Fast UK delivery (free over £50)
- Secure online pharmacy with genuine UK stock
Frequently Asked Questions
What is the difference between ferrous fumarate and ferrous sulfate?
Ferrous fumarate usually delivers more elemental iron per tablet and tends to cause fewer stomach issues.
How long until I feel the benefits?
Most people notice improved energy levels within 2–4 weeks. Full correction of iron levels typically takes 3–6 months with regular blood tests.
Can I take this during pregnancy?
Yes, ferrous fumarate is commonly prescribed in pregnancy. Always follow your midwife or doctor’s advice.
Do these tablets cause constipation?
They can, like most iron supplements. Taking with food or every other day can help minimise this.
Is this the same strength as the NHS version?
Yes – this is the exact 322mg strength used by the NHS.


Pauline Brown (verified owner) –
I’ve tried several iron supplements before, but these tablets are by far the best. They absorb well, and I didn’t experience any digestive issues.