Like all treatments, chemotherapy can cause side effects. These will affect each man differently, and you might not get all the possible side effects. Before you start treatment, talk to your doctor or nurse about the side effects. Knowing what to expect can help you deal with them.
Most of the side effects are temporary and will gradually go away after you finish treatment.
Chemotherapy targets and kills cells that grow quickly, such as cancer cells. But it can also affect some healthy cells that grow quickly and this can cause side effects. These include the cells in:
- the bone marrow
- the lining of the mouth
- parts of the gut, such as the bowel
- hair follicles – which are responsible for hair growth
- finger and toe nails.
Tell your doctor or nurse about any side effects you have as soon as you get them. There are treatments available to help improve some of them, and things you can do yourself.
Side effects can happen with all types of chemotherapy. The most common ones are described here. But there are others that are less common, and each type of chemotherapy can also cause its own particular side effects. Ask your doctor or nurse about the possible side effects of the chemotherapy you’re having.
Chemotherapy affects how well your bone marrow works. Bone marrow is the spongy material that fills some of your bones. It makes red and white blood cells and other cells called platelets. There may be a drop in the levels of any of these cells during chemotherapy, and this can cause side effects. This usually happens about 7 to 10 days after each treatment session.
During chemotherapy your body might be less able to fight off infections. This is caused by a drop in the number of white blood cells. You might hear this called neutropenia. White blood cells are part of your immune system and help fight infection.
It’s important to contact the hospital immediately if you think you might have an infection because it could make you very unwell. Possible signs of an infection include a fever (high temperature), sweating, chills and shivering, or a sore throat.
It’s important to keep a thermometer at home so you can check your temperature if you feel unwell. A fever is a temperature higher than 37.5 degrees C or 99.5 degrees F. If you’re taking steroids, your temperature may not be raised by an infection, so you should contact the hospital straight away if you feel unwell, even without a fever.
If you can’t get in touch with your medical team, go to your nearest accident and emergency (A&E) department and tell them you’re having chemotherapy. Don’t wait to see if your symptoms get better, go in straight away.
I had a firm telling-off for delaying calling my doctor when I had signs of an infection. I learnt
that I must call, even if I think it’s something trivial.
It’s important to lower your chances of catching infections from other people. Try to avoid close contact with people who have an infection. This includes viral infections such as coughs and colds. Ask your doctor for more advice on avoiding infections.
Chemotherapy can affect the white blood cells that make up part of your immune system. You should avoid having a type of vaccine called a live vaccine during your treatment, and for at least six months afterwards. This is because your immune system might not be strong enough to cope. Vaccines against shingles and yellow fever are both examples of live vaccines, so these should be avoided. But it is safe to be around others who have had these vaccines.
Other vaccines such as the flu jab or the pneumonia jab are safe, but may not give you as much protection as usual because your immune system may be weaker. It’s always best to check with your doctor or nurse before having a vaccine.
Feeling breathless, tired or weak
This can be caused by a drop in the number of red blood cells, which means not enough oxygen is carried around the body. This is known as anaemia. If this happens, your doctor may delay your next treatment session to give your red blood cells time to recover. If your level of red blood cells falls very low, you may need to have a blood transfusion. Read more about anaemia.
Bleeding and bruising more easily than normal
This can be caused by a drop in the number of platelets in your blood. Platelets help your blood to clot. A low level of platelets is called thrombocytopenia. You may get nose bleeds or bleeding gums. There are things you can do to lower the risk of bleeding, such as using a softer toothbrush, and an electric shaver rather than a razor. Some men with advanced prostate cancer pass some blood in their urine, and chemotherapy can make this worse. You should contact your doctor or nurse straight away if you get any of these side effects.
Extreme tiredness (fatigue)
Many men say that fatigue is one of the hardest side effects to cope with. Fatigue is extreme tiredness or exhaustion, which makes it hard to carry out your daily activities. Some men describe feeling weak, lethargic, knackered or drained.
Fatigue is usually worse towards the end of your treatment. Most people find their energy levels improve after finishing treatment, but for some, fatigue can be long-lasting.
Sometimes there is a specific cause for your tiredness, like low levels of red blood cells. And tiredness can be caused by things other than your treatment. For example, the cancer itself can make you feel tired, and so can feeling anxious or depressed.
Read our information on ways to manage fatigue. You may also be interested in our fatigue support service.
Feeling and being sick (nausea and vomiting)
Chemotherapy for prostate cancer is not as likely to make you feel sick as some other types of chemotherapy. If you do feel sick, your doctor can prescribe anti-sickness medicines (anti-emetics). Your doctor or nurse can also talk you through other things that might help, for example particular foods to eat or avoid, and relaxation techniques.
If the smell of food is putting you off eating, try to avoid strong-smelling foods and choose cold foods as they don’t usually smell as much. If possible, ask someone to make your meals for you. You may also find it helps to avoid fried, greasy or very sweet foods. Some people find things flavoured with peppermint or ginger can help, such as herbal teas or sweets.
Tell your GP or doctor or nurse at the hospital if you continue to feel or be sick.
Loss of appetite
You might lose your appetite during chemotherapy. This can happen because of some of the side effects of treatment, such as feeling sick or having a sore mouth.
Chemotherapy can also make food taste different – it might taste more salty, bitter or metallic, or it might lose its taste.
Some people find sucking on boiled sweets, fresh or tinned pineapple or taking sips of ginger beer can leave a pleasant taste in their mouth. If you don’t feel like eating much, it’s important to drink plenty of fluids and to find foods that are more appealing to you. Eating small meals and having regular snacks that are high in calories and protein might also help you to get the energy and nutrients you need.
The steroids you take with your chemotherapy should help improve your appetite. But if you’re having problems eating a balanced diet or if you’re losing weight, talk to your doctor or nurse. They may be able to refer you to a dietitian who specialises in helping people with cancer.
During chemotherapy, I found that most foods tasted a bit funny. Save your favourite meals for after your treatment has finished.
Some chemotherapy drugs can make your mouth sore, but this is uncommon. You may get ulcers or inflamed gums, which can be painful. There are things that might help to prevent and relieve a sore mouth.
- Brush your teeth gently twice a day with a soft toothbrush and use mouth washes regularly.
- Be very careful when flossing, and avoid using tooth picks. Ask your doctor or dentist if it’s safe to floss and what to use.
- Try making small changes to your diet such as choosing soft, moist foods and avoiding foods that are acidic, spicy, very hot or very cold.
- Try drinking through a straw.
Your nurse can give you more information about taking care of your mouth. If it gets very sore, your doctor might prescribe pain-relieving drugs to help.
Some types of chemotherapy may make your bowel movements loose and watery (diarrhoea). This usually happens in the first few days after treatment. Other chemotherapy drugs and some anti-sickness medicines can make it difficult to empty your bowels (constipation). Bowel problems can usually be controlled with medicines or changes to what you eat, so let your doctor or nurse know about any problems you’re having.
Make sure you’re drinking enough water – about eight glasses (two litres) a day. This will help to replace the water that’s lost with diarrhoea, and will also help to prevent constipation. It might also be a good idea to avoid fatty, fried and spicy foods, as some men find they can make diarrhoea worse.
Sometimes diarrhoea can be caused by an infection. If you have diarrhoea and you feel unwell or have a fever, you should contact your medical team straight away.
Hair loss is a temporary side effect of some chemotherapy drugs. It affects everyone differently. Some men lose all of their hair but many just notice some thinning and some men have no hair loss at all. Hair loss happens gradually and tends to start two or three weeks after treatment starts. Your hair will usually begin to grow back after you’ve finished treatment. Some men choose to wear a hat or wig until their hair has grown back.
It is important to protect the skin on your head from the sun. It might be more sensitive and burn easily. So even on a cold day, if the sun is shining wear a hat or use sun block.
To help reduce hair loss, scalp cooling may be suitable for some people. This involves wearing a special cap during each treatment session. The cap is filled with a cold gel or connected to a small cooling system. But it doesn’t work for everyone and may not be available in every hospital. If you’re interested in scalp cooling, speak to your doctor or nurse.
This can cause your ankles or legs to swell, or you might feel a bit bloated. This can also be a side effect of steroids. If it does happen, it should improve after you finish treatment.
Numbness or tingling in the hands and feet
Chemotherapy can affect your nerves (peripheral neuropathy). This can cause numbness or tingling in your hands and feet. This usually improves slowly, a few months after treatment finishes.
It’s important to tell your doctor or nurse if you get this. If it’s severe, your doctor might decide to reduce the amount (dose) of chemotherapy you have at each treatment session. Or they might offer a different treatment.
Numbness and tingling can have other causes, including the cancer itself. You may need some tests to check what’s causing it.
Changes to your nails
You may find that your finger nails and toe nails grow more slowly, or become hard, brittle or flaky. The shape or colour of your nails might also change. These changes are temporary and should improve after treatment, though it can take a few months.
Keeping your nails trimmed short and wearing gloves while doing jobs around the house can help protect your nails.
Your eyes might produce more tears than normal. This isn’t common and won’t last long. If your eyes feel sore, inflamed or watery, let your doctor know – they can prescribe eye drops if necessary.
Changes to your mood
Some people say they feel down at certain times during their chemotherapy. This is natural and usually only lasts a short time, but some men find they still feel low after their treatment finishes. If you’re feeling really low and finding it hard to deal with things, speak to your doctor or nurse. There are things that can help and there is support available.
My husband kept a daily diary. It was useful to look back after each treatment and say, 'Oh, I’d forgotten how I felt two days after the infusion – it was just the same this time'.
Side effects of other medicines
You might also get side effects from other medicines you are taking, including steroids and GCSF injections.