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Research into cancer fatigue

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This page tells you about research into cancer fatigue. There is information about


What we know about fatigue

There has been a lot of research interest in cancer fatigue in the past few years. Since treatment for pain and sickness has improved, many people with cancer say that fatigue is the symptom that has the most impact on them. 

Fatigue affects between 70 and 80 out of every 100 people (70 to 80%) with cancer. Health professionals and people with cancer are becoming more aware of how fatigue can affect them and what can be done to help. 

If you have cancer and have signs of fatigue, let your doctor or nurses know. There are things that can help control it. 


Research into how cancers cause fatigue

In many cancers, levels of chemicals that cells use to communicate are increased. These are called cytokines. Researchers are investigating the link between cytokines and fatigue. Cytokines include interleukins and a chemical called tumour necrosis factor (TNF). The higher than normal levels of cytokines could cause fatigue by affecting hormones and chemicals that nerves use to communicate. Interferon is a biological therapy that causes tiredness and this may be due to increasing the production of interleukin and TNF in the body. All body chemicals are finely balanced and any upset in one area can easily affect another. This theory has been suggested to explain chronic fatigue syndrome (ME) and could also apply to cancer.


Research into reducing fatigue

Researchers are looking into a number of different treatments that may help to reduce fatigue. At the moment research shows that exercise seems to work the best to reduce fatigue.


Exercise can increase your energy levels and help you to feel better about yourself and your condition. You can see progress in a short space of time. Generally speaking, the more you do, the more you are able to do and the better it works at reducing fatigue. It depends on your individual situation as what you will be able to do and you should speak to your doctor or physiotherapist before starting exercise. People over the age of 65 appear to gain the greatest benefit but we need more research to find out how much people need to do and how often they should exercise. 


If you are anaemic, the best treatment for fatigue is one that increases your haemoglobin and red blood cell count. Blood transfusions are commonly used to treat anaemia. A drug called erythropoietin (EPO) can also be used for some people. It boosts the production of red blood cells by the bone marrow. Some recent research has shown that EPO may also increase the chance of some types of cancer coming back after treatment. Further research is being carried out to see when EPO can be safely used.

Ritalin and modafinil

Researchers are looking into whether drugs such as ritalin or modafinil can help relieve tiredness during treatment. These drugs are usually used to treat attention and concentration problems. One small study in the US showed that ritalin (Dexmethylphenidate) can reduce tiredness due to advanced gynaecological cancer. It also improved mood. A larger randomised study, also in the US, found that ritalin significantly improved tiredness symptoms. Because ritalin made some other symptoms worse, such as headache and dry mouth, more research is needed..

Steroid (dexamethasone)

Researchers looked at whether a steroid called dexamethasone could help with cancer fatigue. One American study showed that a small dose of dexamethasone twice a day for 2 weeks did help improve fatigue. 


Early studies suggest that acupuncture may help to reduce fatigue by stimulating energy points in the body. A large study looked at acupuncture to help women with severe tiredness following chemotherapy treatment for breast cancer. You can read the results of the trial here

There is detailed information about acupuncture in our section about complementary therapies.

You can search for trials on our clinical trials database. Put the word 'fatigue' into the search box.


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Updated: 5 May 2016