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Iron chelation for iron overload from transfusions | CION Cancer Clinics
Iron chelation removes the extra iron that regular blood transfusions leave behind. Your body cannot clear it on its own, so over years it collects in the liver, heart and hormone glands. Deferasirox, a once-daily tablet, is one of three medicines used. This explains how chelation works, the tests that guide it, the side effects to report and what only your haematologist can decide. At CION Cancer Clinics, our haematology team supports patients and families through treatment, cost questions and life at home.
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Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
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On this page
- Why does iron build up after many blood transfusions?
- Which chelation medicines might your haematologist suggest?
- How does the team decide when to start and how to watch it?
- What do the words on an iron report mean?
- What do families often get wrong about chelation?
- Who might chelation not suit, and what can this page not tell you?
- Common questions about iron chelation
The short answer
Why does iron build up after many blood transfusions?
Every bag of red cells carries iron, and your body has no natural way to get rid of the extra. Iron chelation is a medicine that grabs that spare iron so you can pass it out in urine or stool.
Where the extra iron goes
When you have regular transfusions over months or years, the iron has nowhere to go. It settles in the liver first, then in the heart and in the glands that make hormones. For a long time you feel nothing. Over years, too much iron can scar the liver, strain the heart and upset blood sugar and growth.
Who usually needs it
Chelation is most often used by people who depend on transfusions for a long time. That includes children and adults with thalassaemia major, people with myelodysplastic syndrome (a bone marrow disorder where the marrow makes poor blood cells), some people with sickle cell disease, and people whose marrow has failed. Someone who had a few transfusions during one course of chemotherapy rarely needs it.
What deferasirox is
Deferasirox is one of the chelating medicines. It is taken by mouth, once a day, which is why many families ask about it by name. It is not the only choice, and it does not suit everyone.
This page explains how chelation works. It does not tell you whether you need it, which medicine or how much. Your haematologist sets all of that.The options
Which chelation medicines might your haematologist suggest?
Three medicines are used. Each removes iron in a different way and each brings its own checks.
Deferasirox
A tablet taken by mouth, usually once a day. Most of the iron it binds leaves the body in the stool. It is easy to fit into daily life, which helps people keep taking it for years.
Checks it needs
- Kidney blood tests
- Liver blood tests
- Hearing and eye checks over time
Deferiprone
Taken by mouth several times a day. It is thought to be good at pulling iron from the heart, so it is sometimes chosen or combined when heart iron is high.
Checks it needs
- Frequent white cell counts
- Joint and stomach symptoms reported
Desferrioxamine
The oldest of the three. It is given as a slow injection under the skin through a small pump, often overnight, on several nights a week. It works well but is hard to keep up at home.
Sometimes used in hospital through a drip when iron in the heart is dangerously high.Not sure whether this applies to you?
Ask an oncologistHow it is planned
How does the team decide when to start and how to watch it?
Counting transfusions
The team looks at how many units of blood you have had and how many more you are likely to need. Keep a notebook of every transfusion date and hospital, because records from different centres rarely travel together.
Measuring iron
A blood test called ferritin gives a rough idea of stored iron. It rises with infection and liver problems too, so the trend over several tests matters more than one result. A special MRI can measure iron in the liver and heart directly.
Choosing the medicine
The choice depends on your kidneys, liver, blood counts, age, where the iron has settled and what you can manage at home. The amount is worked out from your weight and your iron level.
Regular review
Blood tests for kidneys, liver and counts are repeated often in the first months, then less often. The amount is adjusted as iron falls, and the plan is changed if a test result worries the team.
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When to call the same day
If you take deferiprone and get a fever, sore throat or mouth ulcers, get a blood count checked that same day. The medicine can very rarely wipe out the white cells that fight infection. On any chelation medicine, call your team the same day for severe stomach pain, black stools, vomiting blood, very little urine, yellow eyes or a new rash. If someone is very drowsy, breathless or collapses, go to the nearest emergency department or call 108. Do not make changes to the medicine on your own; tell the doctor which one you take.
On your report
What do the words on an iron report mean?
- Serum ferritin
- A protein that stores iron. A high level usually means too much stored iron, but infection, inflammation and liver disease also push it up. Reference ranges differ between laboratories.
- Transferrin saturation
- How full the iron carrier in your blood is. When it stays very high, loose iron is more likely to harm organs.
- Cardiac T2* MRI
- A scan that estimates iron in the heart muscle. A lower number on this scan means more iron.
- Liver iron concentration
- How much iron is stored in the liver, usually measured by MRI rather than a needle sample.
- Creatinine
- A blood marker of how well the kidneys are filtering. It is watched closely on deferasirox.
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Commonly believed
What do families often get wrong about chelation?
"My child feels fine, so the iron cannot be doing harm."
Iron damage is silent for years. By the time the heart or liver shows signs, the harm has built up for a long time. That is why the team watches tests, not how the person feels.
"Eating less iron-rich food will fix it."
The iron from transfusions is far more than what food adds. Avoiding spinach or jaggery does not remove stored iron, and cutting foods can harm a growing child. Ask the team about diet, but do not rely on it.
"Once ferritin comes down, the tablets can stop."
As long as transfusions continue, new iron keeps arriving. The team may lower or pause the medicine when levels are low, but that is their call, made on repeat tests.
"Chelation is only for thalassaemia."
Anyone who needs regular transfusions over a long time can build up iron, including adults with some blood cancers and marrow disorders.
Being straight with you
Who might chelation not suit, and what can this page not tell you?
Chelation is not right for everyone who has had a transfusion. It may be held back or changed if your kidneys or liver are not working well, if your white cell or platelet count is very low, or if the outlook of the underlying illness means the burden of daily medicine outweighs the benefit. In pregnancy, the team will usually review the plan carefully.
What it cannot do
Chelation does not treat the condition that needs the transfusions. It protects the organs while that condition is managed. It also cannot undo every bit of damage that is already there, although heart and liver iron often improve with steady treatment.
What to bring to the appointment
Bring your transfusion notebook, every ferritin result you have with dates, any MRI reports, and a list of all your medicines, including antacids and herbal products, because some interfere with chelation. Ask who to call if a side effect appears at night. At CION, the haematology team led by Dr. Basudev Pokhrel reviews these together and explains the plan in plain words.
Chelation medicines can be costly over years. Ask whether Aarogyasri, CGHS, ECHS, EHS, PM-JAY or your insurer covers them, and check the current rules, because entitlements change.Questions we are asked
Common questions about iron chelation
How many transfusions before iron becomes a problem?
There is no single number that applies to everyone. Iron builds up with each unit, so people on regular transfusions for many months are the ones watched most closely. Your haematologist tracks your transfusion count and your ferritin trend and tells you when chelation is worth starting.
Is deferasirox safe for children?
It is widely used in children who need regular transfusions, including young children with thalassaemia. Children still need the same kidney and liver checks as adults, plus growth and hearing reviews over time. The amount is worked out by the team from weight and iron level, and adjusted as the child grows.
What side effects are common on deferasirox?
Stomach upset, loose motions, belly pain and a rash are the ones people notice most, usually early on. Changes in kidney or liver tests are less obvious and are found on blood tests, which is why the checks matter. Tell the team about any side effect rather than quietly missing tablets.
What if we miss a dose?
Do not double up or change the plan on your own. Ask your team at the start what to do if a dose is missed, and write the answer down. If doses are being missed often because of side effects, cost or a busy routine, say so honestly. There is often a way to make the plan easier to keep.
Why is ferritin still high after months of tablets?
Stored iron comes down slowly, and new transfusions keep adding more. Ferritin can also stay high because of infection or liver inflammation. The team looks at the trend across several tests and sometimes an MRI before deciding whether the plan needs changing. One high reading on its own is not a failure.
Do we need the heart MRI in Hyderabad?
Not everyone does, and not every centre offers it. It is most useful for people who have had many transfusions over years, or whose ferritin does not match how they are doing. If your team advises it, ask where it is done and whether your scheme or insurer covers it.
Can chelation be taken with other medicines?
Usually yes, but some combinations need care. Certain antacids, painkillers and bone medicines can interact with chelating medicines or add strain on the kidneys and stomach. Show every medicine and supplement you take to the team, including anything bought without a prescription, before anything new is started.
Does a stem cell transplant remove the need for chelation?
After a successful transplant, new transfusions often stop, but the iron already stored stays behind. Some people then have iron removed with other methods or continue chelation for a while. CION's team can review your case and help you plan with the transplant centre, which makes that decision.
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Dr. Basudev Pokhrel reviews blood counts, transfusion needs and blood disorders, and works with the CION tumour board on blood cancers.
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Sources
- NHS — Thalassaemia: treatment
- NHLBI — Thalassemias: treatment
- NHS — Blood transfusion
- American Society of Hematology — Blood disorders for patients
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Supportive Care Specific to HaematologyThe wider guide to care around blood disorder treatmentTransfusion Reactions and What They Feel LikeWhat to watch for during and after a transfusionIrradiated and Leucodepleted Blood ProductsWhy some patients need specially prepared bloodBlood counts during chemotherapyHow counts are read during treatment
Talk to us
Worried about iron after many transfusions?
Share your transfusion history and ferritin reports. Our haematology team will explain what they show and what to ask next. One helpline serves every CION centre.