A chemotherapy used in stem-cell transplant conditioning
Thiotepa
A chemotherapy used in high-dose conditioning before stem-cell transplant and for some cancers, given under specialist care.
What is Thiotepa?
Thiotepa is a specialist alkylating chemotherapy used mainly as part of high-dose conditioning treatment before a stem-cell (bone-marrow) transplant, and for some cancers. It is given by injection by a cancer team. Its dominant effect is severe suppression of the bone marrow, which markedly lowers blood counts. It is also passed out in the skin, so skin reactions are common and careful skin washing and dressing changes are needed. It often causes painful inflammation of the mouth and gut lining (mucositis). It is only used under close specialist supervision.
Education and reference only. This is a plain-language guide to Thiotepa — 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
Thiotepa is a chemotherapy medicine in the group called alkylating agents. Its main use is as part of high-dose conditioning treatment given before a stem-cell or bone-marrow transplant, where strong chemotherapy is used to clear the existing marrow and make room for the transplanted cells. It is also used in the treatment of certain cancers. It is given as an injection, usually into a vein, by a specialist cancer or transplant team. Because it is a powerful medicine with significant effects on the blood and skin, it is always given in a highly monitored hospital setting.
How it works
Thiotepa damages the genetic material inside cells, stopping them from dividing and causing them to die. This is especially useful for clearing fast-dividing cancer cells and, in transplant conditioning, for clearing the existing bone marrow. Because it affects dividing cells generally, it also strongly suppresses the healthy bone marrow and damages the lining of the mouth and gut. A particular feature is that some of the medicine is removed through the skin in sweat, which is why it can cause skin reactions and why careful skin care is part of treatment.
Company & origin
Originated / developed by: Specialist manufacturer.
A specialist chemotherapy used in the UK, often in high-dose conditioning before a stem-cell transplant and to treat some cancers.
Practical use
How to take Thiotepa
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- It is given to you as an injection by your specialist cancer or transplant team in hospital.
- Wash your skin and change clothing, dressings and bedding as often as your team advises, because the medicine comes out in the skin.
- Follow mouth-care advice closely and report mouth or throat pain, as inflammation of the lining is common.
- Tell your team straight away about fever, unusual bruising or bleeding, or feeling generally unwell.
- Attend all monitoring and follow infection-prevention advice while your blood counts are low.
Weighing it up
Advantages & disadvantages of Thiotepa
Advantages
- An important medicine for high-dose conditioning before a stem-cell transplant.
- Also used in the treatment of some cancers.
- Given by experienced teams with intensive monitoring and support.
Disadvantages
- Causes severe bone-marrow suppression, greatly increasing infection, bleeding and anaemia risk.
- Is excreted in the skin and commonly causes skin reactions, needing careful skin and dressing care.
- Often causes painful inflammation of the mouth and gut lining (mucositis).
Practical use
Good to know
The dominant effect of thiotepa is severe bone-marrow suppression: blood counts fall markedly, greatly raising the risk of infection, bleeding and anaemia, which is why it is given with intensive support such as protective isolation, blood products and, in transplant, the rescue stem cells. A distinctive practical point is that the medicine is excreted in the skin, so it can cause skin reactions, particularly in skin folds and under dressings; frequent washing of the skin and regular changing of dressings and bedding are used to reduce this. Painful inflammation of the lining of the mouth and gut, called mucositis, is common and is managed with mouth care and pain relief. Because of all this, thiotepa is only ever used by experienced specialist teams. Report fevers, mouth pain that stops you eating or drinking, unusual bruising, or worsening skin promptly.
Who should not take it / use with caution
- People who have had a serious allergic reaction to thiotepa should not be given it.
- It is used with great caution in people with significant existing bone-marrow, kidney or liver problems.
- It is not used in pregnancy except where a specialist judges it essential, because chemotherapy can harm an unborn baby.
- It is only used under close specialist supervision in a highly monitored hospital setting.
Monitoring
- Frequent blood counts to monitor the marrow-suppressing effects.
- Regular checks of the skin, mouth and gut lining for reactions and mucositis.
- Monitoring liver function and watching for infection while blood counts are low.
Side effects
- Severe lowering of blood counts, raising the risk of infection, bleeding and anaemia.
- Skin reactions such as darkening, rash, peeling or soreness, especially in skin folds.
- Painful inflammation of the mouth and gut lining (mucositis), with nausea and diarrhoea.
- Rarely but seriously, liver problems, lung effects or seizures, which the team watches for.
Key interactions
- Other medicines that suppress the bone marrow add to the risk of very low blood counts.
- Some medicines change how thiotepa is broken down in the body, so the team reviews everything you take.
- Live vaccines are avoided during and after treatment because the immune system is weakened.
Available as: A powder made up into a solution for injection, usually into a vein.
Answers
Thiotepa: frequently asked questions
What is thiotepa used for?
It is a chemotherapy used mainly as part of high-dose conditioning treatment before a stem-cell or bone-marrow transplant, and to treat some cancers.
Why do I need to wash my skin and change dressings so often?
Some of the medicine is removed from the body through the skin in sweat, so frequent washing and changing of dressings, clothing and bedding helps reduce skin reactions.
Why are my blood counts so low?
Severe bone-marrow suppression is the dominant effect of thiotepa, so blood counts fall and you are supported with measures to prevent infection and bleeding until they recover.
What is mucositis?
Mucositis is painful inflammation of the lining of the mouth and gut that is common with thiotepa; it is managed with mouth care and pain relief, so report mouth or throat pain that stops you eating or drinking.
Can I have it at home?
No. It is given by an experienced specialist team in hospital, with intensive monitoring of your blood, skin and general health.
The wider class
About Alkylating chemotherapy
Thiotepa belongs to the alkylating chemotherapy class. For how the class as a whole works, its shared safety principles and monitoring, see the full guide.
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Authoritative sources
- BNF
- NICE CKS
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