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 higher over-the-counter iron strengths available in the UK, and is the same strength commonly supplied on NHS prescription.
- 322mg ferrous fumarate per tablet
- Approx. 106mg elemental iron per tablet
- Film-coated for easier swallowing
- 28 tablets per pack
- Brands may vary (generic equivalent)
Key Features
- High elemental iron content (approx. 106mg per tablet)
- One of the stronger OTC iron strengths available in the UK
- Once-daily dose for most adults
- Gentle film-coated formula
About Ferrous Fumarate and Iron
Iron is essential for producing haemoglobin, the protein in red blood cells that carries oxygen around the body. When the body’s iron stores are low, red blood cell production is affected — a condition known as iron-deficiency anaemia. Ferrous fumarate is a source of iron used to help restore and maintain normal iron levels. For more information, see 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 the 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). The full list of excipients is in the Patient Information Leaflet.
Ferrous Fumarate vs Other Iron Supplements
| Feature | Ferrous Fumarate 322mg | Ferrous Sulfate 200mg | Ferrous Gluconate |
|---|---|---|---|
| Elemental iron per tablet | ~106mg | ~65mg | ~35mg |
| Tolerability | Good | Moderate | Often best |
| Typical daily dose | 1 tablet | 1–2 tablets | 2–3 tablets |
| Commonly supplied on NHS | Yes | Yes | Less common |
This table compares the elemental iron content of ferrous fumarate with other common iron salts.
How It Compares to Other Iron Supplements
Many people ask how this compares to ferrous sulfate. Ferrous fumarate generally provides more elemental iron per tablet and may be better tolerated than some other iron salts.
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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 should I take ferrous fumarate for?
Your GP will usually recheck your iron levels after a few weeks. A course is typically continued for 3–6 months to rebuild iron stores, as advised by your doctor.
Can I take this during pregnancy?
Ferrous fumarate is commonly supplied 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 same 322mg strength commonly supplied on 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.