Chemotherapy when you are living with HIV

Yes. People living with HIV can have chemotherapy, and those whose HIV is well controlled on treatment are generally offered the same cancer treatment as anyone else. HIV is linked to some cancers, including certain lymphomas, Kaposi sarcoma, cervical cancer and anal cancer, but people with HIV can develop any cancer. The single most important principle is to keep taking antiretroviral treatment without interruption. It protects your immune system during chemotherapy, lowers the risk of serious infections, and supports safe cancer care. Stopping HIV medicines, even for a short time, can allow the virus to rebound and lead to resistance.

Interactions between HIV and cancer medicines need careful attention. Some HIV medicines, especially those boosted with ritonavir or cobicistat, slow the breakdown of many cancer medicines, such as vincristine, docetaxel and several targeted tablets, which can increase side effects. Others, such as efavirenz, can speed up breakdown and reduce effectiveness. For this reason, your HIV doctor may switch you to an HIV regimen with fewer interactions, for example one based on dolutegravir, before or during chemotherapy. Only your HIV doctor should make this change, in discussion with your oncologist.

Before treatment, your team will usually check your CD4 count, which shows how strong your immune system is, and your viral load, which shows how well HIV is controlled. Tests for hepatitis B and C and for tuberculosis are also important, because these infections are more common with HIV and can flare during chemotherapy. Depending on your CD4 count and treatment, your doctors may prescribe medicines to prevent certain infections, such as co-trimoxazole, during treatment.

Never stop HIV medicines

Continue antiretroviral treatment through chemotherapy unless your HIV doctor advises a change.

Both doctors need your full medicine list

Include HIV medicines, preventive antibiotics and any herbal products.

Free HIV treatment continues

Government ART centres provide free HIV treatment. Keep your supply going during cancer care.

It cannot tell you whether your HIV medicines need changing, or which cancer medicines are safe with them. That depends on your regimen, CD4 count, viral load and cancer treatment, and must be decided by your HIV doctor and oncologist together.

It also cannot interpret your CD4 or viral load results. Ask your doctors what your results mean for your treatment.

When HIV is found at cancer diagnosis

Some people learn they have HIV when they are diagnosed with cancer. This is a lot to take in at once. HIV treatment is usually started promptly, often alongside cancer treatment, and counselling is available. Many people with newly diagnosed HIV go on to complete cancer treatment.

Hepatitis B and HIV together

Some HIV medicines, such as tenofovir, also treat hepatitis B. If you have both infections, stopping or changing these medicines can cause a hepatitis flare, so changes must be carefully planned.

Protecting partners

Condoms protect partners from HIV and from traces of chemotherapy in body fluids. People with an undetectable viral load do not transmit HIV sexually, but condoms are still advised during chemotherapy.

Emotional support

Living with HIV and cancer can bring worry, stigma and isolation. Counsellors at ART centres and cancer hospitals, and peer support groups, can help.

Nutrition and general health

Good nutrition, not smoking, and managing other conditions support both HIV and cancer care.

Cervical and anal cancer screening

People living with HIV benefit from regular cervical and, where advised, anal cancer screening, before and after cancer treatment.

Cancers linked to HIV

Some cancers are more common in people living with HIV, particularly when immunity is low. These include certain aggressive lymphomas, Kaposi sarcoma, and cancers linked to human papillomavirus such as cervical and anal cancer. Hodgkin lymphoma, liver cancer linked to hepatitis, and lung cancer in smokers are also more common. Treatment for these cancers follows similar principles to treatment in people without HIV, adapted for interactions and infection risk.

Blood counts and infections

HIV itself and some HIV medicines can lower blood counts, which chemotherapy then lowers further. Your team may use injections that help white cells recover, adjust timing, and watch closely for infections such as pneumonia, thrush, shingles and tuberculosis. Report fever promptly, as infections can progress quickly.

Keeping up HIV medicines when sick

Nausea and mouth sores can make it hard to take HIV medicines regularly. Ask for anti-sickness medicines that do not interact with your HIV regimen, and tell your team early if you are missing doses. Some HIV medicines come as single combined tablets that are easier to take.

Telling your oncology team about HIV

Some people hesitate to share their HIV status with a new team. Sharing it allows safe planning, interaction checks and infection prevention, and it stays confidential.

Viral load during treatment

Viral load is usually checked during and after chemotherapy to make sure HIV stays controlled. A rise needs prompt review by your HIV doctor.

Support from ART centres

ART centre counsellors can help with medicine supply, disclosure, travel for cancer treatment and linking to social support schemes.

What to do next

Keep taking HIV medicines, share your full medicine list with both doctors, ask for an interaction review before treatment, have CD4, viral load, hepatitis and TB checks, take any prescribed preventive medicines, use condoms, and seek urgent help for fever or new symptoms.