Chemotherapy when you have had an organ transplant

Yes, in many cases, but it needs close coordination between your transplant team and your oncologist. People who have had a kidney, liver, heart or lung transplant take anti-rejection medicines for life, and these medicines lower the immune system's ability to fight infections and some cancers. As a result, certain cancers are more common after transplant, including skin cancers and a type of lymphoma linked to transplant medicines, but any cancer can occur. When chemotherapy is needed, the challenge is balancing three things: treating the cancer effectively, preventing serious infections while immunity is even lower, and protecting the transplanted organ from rejection or damage.

Anti-rejection medicines are central to the plan. Tacrolimus, ciclosporin, mycophenolate, azathioprine, sirolimus, everolimus and prednisolone are commonly used. During cancer treatment, your transplant team may reduce some of these medicines to help the immune system fight the cancer and lower infection risk, especially for transplant-linked lymphoma, where reducing immunosuppression is often part of treatment. In some situations, medicines may be switched, for example to sirolimus or everolimus, which may be preferred in certain cancers. Any change carries a risk of rejection, so it must be decided and monitored by the transplant team. Mycophenolate and azathioprine also lower blood counts, which adds to chemotherapy effects and may lead to temporary changes.

Interactions are common. Tacrolimus and ciclosporin levels can rise or fall with some anti-sickness medicines, antifungals, antibiotics and cancer medicines, so blood levels are checked more often. Kidney function matters for kidney transplants and for anyone on tacrolimus or ciclosporin, which can strain the kidneys, so medicines such as cisplatin need extra care. Infections such as cytomegalovirus, fungal infections and pneumonia need close monitoring and sometimes preventive medicines prescribed by your doctors.

Never change anti-rejection medicines yourself

Only your transplant team should adjust them.

Blood levels will be checked more often

Tacrolimus or ciclosporin levels guide safe changes during treatment.

Know the signs of rejection

Your transplant team will explain signs specific to your organ.

It cannot tell you how your anti-rejection medicines should change, or which chemotherapy is safe for your transplanted organ. These are specialist decisions based on your transplant, cancer and test results.

It also cannot predict the risk of rejection for you. Your transplant team will explain the balance of risks.

Transplant-linked lymphoma

This lymphoma is often linked to Epstein-Barr virus and reduced immunity. Reducing anti-rejection medicines is frequently the first step, sometimes followed by antibody treatment such as rituximab, with chemotherapy if needed. Treatment is individual and coordinated closely between teams.

Skin cancer after transplant

Skin cancers are the most common cancers after transplant. Protecting skin from the sun, regular skin checks and early treatment of new spots are important for life.

Vaccinations

Live vaccines are avoided after transplant and during chemotherapy. Ask about recommended non-live vaccines for you and your household.

Emotional impact

After the effort of a transplant, a cancer diagnosis can feel overwhelming, with fears of losing the organ. Counselling and peer support can help.

Donor organ concerns

Very rarely, cancer is passed on through a donated organ. If this is suspected, your team will explain the options.

Cost of monitoring

Extra drug level tests and infection monitoring add cost. Ask the social worker about support.

Kidney transplants and chemotherapy

For people with a kidney transplant, protecting the kidney is a priority. Medicines that strain the kidneys, such as cisplatin, may be avoided or given with extra fluids and monitoring. Dehydration from vomiting or diarrhoea is particularly risky, so report it early. Kidney function and tacrolimus or ciclosporin levels are checked closely.

Liver transplants and chemotherapy

After a liver transplant, liver tests are watched closely, as both rejection and chemotherapy can affect them. Some medicines processed by the liver need adjustment. Hepatitis B or C infection, if it was the reason for transplant, needs continued antiviral treatment.

Heart and lung transplants

After heart or lung transplant, medicines that can affect the heart or lungs are chosen with great care, and heart or lung function tests may be repeated during treatment. Lung infections are a particular concern.

Cytomegalovirus and other infections

Cytomegalovirus is a common virus that can reactivate when immunity is low, causing fever, low blood counts, diarrhoea or organ inflammation. Transplant teams may check for it with blood tests and prescribe antiviral medicine if needed. Fungal infections and pneumonia are also watched for.

Hand hygiene and food safety

Careful hand washing, avoiding people with infections, eating well-cooked food and drinking safe water are especially important after transplant during chemotherapy.

Keeping both teams updated

Share results and letters between your transplant and cancer teams after every visit, and keep one list of all medicines.

Medicines from other doctors

Always tell any doctor, dentist or pharmacist that you have a transplant and are on chemotherapy before starting any new medicine.

Carrying a transplant card

Carry a card or letter showing your transplant, anti-rejection medicines and contacts for your transplant and oncology teams, so emergency staff can act safely.

What to do next

Inform your transplant team straight away, ask for a joint written plan, never change anti-rejection medicines yourself, attend drug level and organ function tests, check every new medicine with your teams, protect yourself from infections, and seek urgent help for fever or signs of rejection.