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This site is intended for patients. If you are a healthcare professional then please visit our healthcare professional website. This website is intended for patients who have been prescribed FERACCRU®, if you are a member of the public please visit our public site.

Like all medicines, FERACCRU® can cause side effects, although not everybody gets them

You might be worried about side effects, especially if you have had them when taking other oral iron tablets. FERACCRU® contains ferric maltol, a formulation which contains a type of iron that is only released and taken in when it reaches the gut wall.1,2

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What are the most common side effects?

The most common side effects are:

  • Stomach pain
  • Flatulence (wind)
  • Constipation
  • Stomach discomfort or bloating
  • Diarrhoea
  • Nausea (feeling sick)
  • Discoloured faeces



These may affect up to 1 in 10 people who take FERACCRU®.


For uncommon side effects (which may affect 1 in 100 people), please consult the Patient Information Leaflet in the carton.

What should I do if I have side effects?


If you get any side effects, talk to your doctor, nurse or pharmacist. This includes any side effects not listed in the Patient Information Leaflet.

Adverse events should be reported to a regulatory agency. Adverse events should also be reported directly to Norgine Ltd by emailing

By reporting side effects you can help provide more information on the safety of this medicine.

How can side effects be reduced?

Stomach pain, discomfort, bloating or nausea (feeling sick)3
Stick to simple meals, for example plain carbohydrates such as rice with vegetables and fish or meat prepared without herbs and spices,4 and do not eat rich or spicy food.4 If you are sick, try small frequent sips of water to avoid dehydration.

Eat more high fibre foods such as fresh fruit, vegetables and cereals, and drink plenty of water. Regular exercise can help too, so try going for a daily walk or doing some gentle exercise.

Drink plenty of fluids to stay hydrated. These could be water, soft drinks, cordials, fruit juice, tea or coffee.

Discoloured faeces3
This is normal when taking iron and is nothing to worry about. But you should talk to your doctor if your poo looks black and sticky, has red streaks in it, or if you feel unwell in any other way.


  1. Stallmach A and Büning C. Expert Opin Pharmacother 2015;16(18):2859–2867.
  2. Gasche C, et al. Inflamm Bowel Dis 2015;21(3):579–588.
  3. NHS. Ferrous sulfate. Available at: Accessed December 2021.
  4. Tuntipopipat S, et al. J Nutr 2006;136(12):2970–2974.