An intravenous iron treatment for iron deficiency
Iron sucrose
An iron treatment given by drip or injection into a vein, used when iron tablets are unsuitable or not enough, often in kidney disease.
What is Iron sucrose?
Iron sucrose is a form of iron given directly into a vein to treat iron deficiency and iron-deficiency anaemia. It is used when iron tablets are not suitable, are not tolerated, or do not work well enough, for example in people with kidney disease, those on dialysis, or after some operations. It is given by a healthcare professional, as a slow injection or a drip, so the body's iron stores can be topped up to help make healthy red blood cells. It is given in a setting where staff can watch for reactions, as allergic-type reactions can rarely occur.
Education and reference only. This is a plain-language guide to Iron sucrose — it deliberately contains no doses. Doses depend on the person, the brand and the reason for treatment, and belong with your prescriber. Always check the BNF, the product labelling (SmPC) and follow medical advice.
What it is
Iron sucrose is a medicine that provides iron directly into the bloodstream through a vein, rather than as tablets. Iron is needed to make haemoglobin, the substance in red blood cells that carries oxygen, and a shortage causes iron-deficiency anaemia, with tiredness and breathlessness. Iron sucrose is used when tablets are not the right choice, for example when they upset the stomach too much, are not absorbed well, do not raise iron levels quickly enough, or in people with kidney disease, including those on dialysis. It is given by a nurse or doctor in a clinic or hospital setting.
How it works
Iron sucrose delivers iron straight into the blood, where it is taken up and stored by the body and then used in the bone marrow to make haemoglobin and healthy red blood cells. Because it bypasses the gut, it avoids the problems of poor absorption and stomach upset that can limit iron tablets, and it can build up iron stores more reliably and quickly. This makes it especially useful in kidney disease, where the body often struggles to use and absorb iron and where extra iron is frequently needed alongside other anaemia treatments. The amount needed depends on how low the iron stores are.
Company & origin
Originated / developed by: Specialist manufacturer.
An iron medicine given into a vein in the UK to treat iron deficiency and iron-deficiency anaemia when iron tablets are unsuitable or not enough, often in kidney disease.
Practical use
How to take Iron sucrose
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- It is given by a nurse or doctor into a vein, as a slow injection or a drip, not taken at home.
- Stay for the short observation period afterwards so staff can check you for any reaction.
- Tell the team straight away if you feel unwell during the infusion, such as dizziness, a rash, swelling or difficulty breathing.
- Attend the blood tests used to check your iron levels and blood count, which guide how much you need.
- Tell the team about any previous reaction to iron given into a vein before treatment.
Weighing it up
Advantages & disadvantages of Iron sucrose
Advantages
- Builds up iron stores reliably when tablets are unsuitable, not tolerated or not working well enough.
- Avoids the stomach upset and poor absorption that can limit iron tablets.
- Especially useful in kidney disease and dialysis, where iron tablets often do not work well.
Disadvantages
- Must be given into a vein by trained staff, usually in a clinic or hospital, rather than at home.
- Can rarely cause allergic-type reactions, so it is given where you can be observed.
- Can cause minor effects such as a metallic taste, headache or changes in blood pressure during the infusion.
Practical use
Good to know
The main thing to understand is that iron sucrose is given into a vein by trained staff, usually because iron tablets are unsuitable or not enough, and that it is given where you can be watched for a short time afterwards because allergic-type reactions, although uncommon, can happen. It is particularly useful in kidney disease and dialysis, where iron tablets often do not work well. Minor effects such as a metallic taste, headache, feeling sick or changes in blood pressure can occur during or just after the infusion, and the skin around the needle can occasionally be irritated or stained if any leaks out. Because too much iron is also harmful, your iron levels and blood count are checked so that the right amount is given. Tell the team about any previous reactions to iron given into a vein.
Who should not take it / use with caution
- People who have had a serious allergic reaction to iron sucrose or other injectable iron should not be given it.
- It is not used in people who have iron overload or anaemia that is not caused by iron deficiency.
- It is used with care in pregnancy, generally avoided early on and given only when clearly needed under specialist advice.
- It is used with caution in people with serious liver problems or active infection, under medical guidance.
Monitoring
- Checking iron levels and blood count to judge how much is needed and the response to treatment.
- Observing you during and shortly after the infusion for any reaction.
- Reviewing the cause of the iron deficiency so that it can be addressed as well as treated.
Side effects
- A metallic taste, headache, nausea or feeling flushed during or shortly after the infusion.
- Changes in blood pressure, dizziness or muscle aches in some people.
- Irritation or staining of the skin where the needle is, and, rarely, allergic-type reactions that need immediate treatment.
Key interactions
- It should not be given at the same time as iron tablets, as the team will advise when to stop or pause them.
- There are few other routine medicine interactions, but tell the team about all your medicines.
- Its use is planned alongside other anaemia treatments, such as those used in kidney disease, under specialist care.
Available as: A solution given into a vein as a slow injection or a drip.
Answers
Iron sucrose: frequently asked questions
What is iron sucrose used for?
It treats iron deficiency and iron-deficiency anaemia when iron tablets are unsuitable, not tolerated or not enough, often in people with kidney disease, including those on dialysis.
Why is it given into a vein instead of as tablets?
Giving iron into a vein bypasses the gut, avoiding the stomach upset and poor absorption that can limit tablets, and builds up iron stores more reliably, which is especially helpful in kidney disease.
Is it safe?
It is generally well tolerated, but allergic-type reactions can rarely occur, which is why it is given by trained staff who watch you for a short time afterwards.
Will it be done at home?
No. It is given by a nurse or doctor into a vein in a clinic or hospital setting where you can be observed, not taken at home.
Why do I need blood tests with it?
Your iron levels and blood count are checked to make sure the right amount is given, since too little iron leaves anaemia untreated and too much iron is also harmful.
Authoritative sources
- BNF
- NICE CKS
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