What is CHOP?

CHOP is used to treat non-Hodgkin lymphoma (NHL).

It is best to read this information with our general information about chemotherapy and the type of cancer you have.

CHOP comes from the initials of the drugs used:

Your doctor will talk to you about this treatment and its possible side effects before you agree (consent) to have treatment.

How CHOP is given

You will be given CHOP in the chemotherapy day unit or during a stay in hospital. A chemotherapy nurse will give it to you. 

During treatment you usually see a cancer doctor, a chemotherapy nurse or a specialist nurse, and a specialist pharmacist. This is who we mean when we mention doctor, nurse or pharmacist in this information.

Before or on the day of treatment, a nurse or person trained to take blood (phlebotomist) will take a blood sample from you. This is to check that your blood cells are at a safe level to have chemotherapy. 

You will see a doctor or nurse before you have chemotherapy. They will talk to you about your blood results and ask you how you have been feeling. If your blood results are okay, the pharmacist will prepare your chemotherapy. Your nurse will tell you when your treatment is likely to be ready. 

Your nurse usually gives you anti-sickness (anti-emetic) drugs before the chemotherapy. The chemotherapy drugs can be given through: 

  • a short thin tube the nurse puts into a vein in your arm or hand (cannula)
  • a fine tube that goes under the skin of your chest and into a vein close by (central line)
  • a fine tube that is put into a vein in your arm and goes up into a vein in your chest (PICC line)
  • You will be have prednisolone as tablets.

    Your course of CHOP

    You usually have a course of several cycles of treatment over a few months. Each cycle of CHOP takes 21 days (3 weeks).

    On day 1 the nurse will give you:

    • prednisolone tablets
    • cyclophosphamide as a slow injection (bolus) into a vein
    • doxorubicin as a slow injection (bolus) into a vein
    • vincristine as an infusion.

    On days 2 to 5, you take prednisolone tablets.

    You then have a rest period with no treatment for 16 days. This completes your first cycle of CHOP.

    At the end of the rest period, you start your second cycle of CHOP. This is the same as the first cycle.

    Your nurse or doctor will discuss your treatment plan with you and tell you the number of cycles you are likely to have.

    About side effects

    We explain the most common side effects of this treatment here. We also include some less common side effects. You may get some of the side effects we mention, but you are unlikely to get all of them.

    You may also have some side effects that we have not listed here. Always tell your doctor, nurse or pharmacist about any side effects you have.

    Your doctor can give you drugs to help control some side effects. It is important to take them exactly as your nurse or pharmacist explains. This means they will be more likely to work for you. Your nurse will give you advice about managing your side effects. After your treatment is over, most side effects start to improve.

    Serious and life-threatening side effects

    Some cancer treatments can cause severe side effects. Rarely, these may be life-threatening. Your cancer doctor or nurse can explain the risk of these side effects to you.

    Contact the hospital

    Your nurse will give you telephone numbers for the hospital. If you feel unwell or need advice, you can call them at any time of the day or night. Save these numbers in your phone or keep them somewhere safe.

    More information

    We cannot list every side effect for this treatment. There are some rare side effects that are not listed. You can visit the electronic Medicines Compendium (eMC) for more detailed information.

    Side effects while treatment is being given

    Some people may have side effects while they are being given the chemotherapy or shortly after they have it:

    Allergic reaction

    Some people have an allergic reaction while having this treatment. Signs of a reaction can include:

    • feeling hot or flushed
    • a skin rash
    • itching
    • shivering
    • feeling dizzy
    • a headache
    • feeling breathless
    • swelling of your face or mouth
    • pain in your back, tummy or chest.

    Your nurse will check you for signs of a reaction during your treatment. If you feel unwell or have any of these signs, tell them straight away. If you do have a reaction, it can be treated quickly.

    Sometimes a reaction can happen a few hours after treatment. If you get any signs or feel unwell after you get home, contact the hospital straight away.

    Facial flushing

    You may suddenly feel warm and your face may get red while the drug is being given. This should only last a few minutes.

    Pain along the vein

    This treatment can cause pain at the place where the drip (infusion) is given or along the vein. If you feel pain, tell your nurse or doctor straight away so that they can check the site. They may give the drug more slowly or flush it through with more fluid to reduce pain.

    The drug leaks outside the vein

    If the drug leaks outside the vein, it can damage the surrounding tissue. This is called extravasation. Extravasation is not common but if it happens it is important to treat it quickly. Tell your nurse straight away if you have any stinging, pain, redness or swelling around the vein.

    If you get any of these symptoms after you get home, contact the doctor or nurse straight away on the contact telephone number they gave you.

    Common side effects

    Risk of infection

    This treatment can reduce the number of white blood cells in your blood. These cells fight infection.

    If the number of white blood cells is low, you are more likely to get an infection. A low white blood cell count is called neutropenia.

    If you have an infection, it is important to treat it as soon as possible. Contact the hospital straight away on the 24-hour contact number you have if:

    • your temperature goes over 37.5°C (99.5°F)
    • you suddenly feel unwell, even with a normal temperature
    • you have symptoms of an infection.

    Symptoms of an infection include:

    • feeling shivery
    • a sore throat
    • a cough
    • diarrhoea
    • needing to pass urine often.

    It is important to follow any specific advice your cancer treatment team gives you.

    The number of white blood cells will usually return to normal before your next treatment. You will have a blood test before having more treatment. If your white blood cell count is low, your doctor may delay your treatment for a short time.

    Bruising and bleeding

    This treatment can reduce the number of platelets in your blood. Platelets are cells that help the blood to clot. 

    Tell your doctor if you have any bruising or bleeding that you cannot explain. This includes:

    • nosebleeds
    • bleeding gums
    • tiny red or purple spots on the skin that may look like a rash.

    Some people may need a drip to give them extra platelets. This is called a platelet transfusion.

    Anaemia (low number of red blood cells)

    This treatment can reduce the number of red blood cells in your blood. These cells carry oxygen around the body. If the number of red blood cells is low, you may be tired and breathless. Tell your doctor or nurse if you feel like this. If you are very anaemic, you may need a drip to give you extra red blood cells. This is called a blood transfusion.

    Feeling sick

    You may feel sick in the first few days after this treatment. Your doctor will give you anti-sickness drugs to help prevent or control sickness. Take the drugs exactly as your nurse or pharmacist tells you. It is easier to prevent sickness than to treat it after it has started.

    If you feel sick, take small sips of fluids and eat small amounts often. If you continue to feel sick, or if you vomit more than once in 24-hours, contact the hospital as soon as possible. They will give you advice and may change the anti-sickness drug to one that works better for you.

    Loss of appetite

    This treatment can affect your appetite. Do not worry if you do not eat much for a day or two. But if your appetite does not come back after a few days, tell your nurse or dietitian. They will give you advice. They may give you food or drink supplements.

    Feeling tired

    Feeling tired is a common side effect. It is often worse towards the end of treatment and for some weeks after it has finished. Try to pace yourself and plan your day so you have time to rest. Gentle exercise, like short walks, can give you more energy. If you feel sleepy, do not drive or operate machinery.

    Hair loss

    Your hair will get thinner or you may lose all the hair from your head. You may also lose your eyelashes, eyebrows or other body hair. Hair loss usually starts after your first or second treatment.

    Your nurse can talk to you about ways to cope with hair loss. There are ways to cover up hair loss if you want to. It is important to cover your head to protect your scalp when you are out in the sun.

    Hair loss is almost always temporary and your hair will usually grow back after treatment ends.

    Sore mouth

    You may get a sore mouth or mouth ulcers. This can make you more likely to get a mouth infection.

    Use a soft toothbrush to clean your teeth or dentures in the morning, at night and after meals.

    If your mouth is sore:

    • tell your nurse or doctor – they can give you a mouthwash or medicines to help
    • try to drink plenty of fluids
    • avoid alcohol, tobacco, and foods that irritate your mouth.


    This treatment can cause constipation. Here are some tips that may help:

    • Drink at least 2 litres (3½ pints) of fluids each day.
    • Eat high-fibre foods, such as fruit, vegetables and wholemeal bread.
    • Do regular gentle exercise, like going for short walks.

    If you have constipation, contact the hospital for advice. Your doctor can give you drugs called laxatives to help.


    This treatment may cause diarrhoea. Diarrhoea means passing more stools (poo) than is usual for you, or having watery or loose stools. If you have a stoma, it will be more active than usual.

    If you have diarrhoea:

    • try to drink at least 2 litres (3½ pints) of fluids each day
    • avoid alcohol, caffeine, milk products, high-fat foods and high-fibre foods
    • contact the hospital for advice.

    Bladder irritation

    Cyclophosphamide may irritate your bladder and cause discomfort when you pass urine (pee). Drink plenty of fluids, at least 2 litres (3 ½ pints) during the first 24 hours after chemotherapy. It is also important to empty your bladder regularly and to try to pass urine as soon as you feel you need to. Contact the hospital straight away if you find it difficult to pass urine. Or contact the hospital if you feel any discomfort or stinging when you pass urine. If you notice any blood in your urine tell your doctor straight away.

    Discoloured urine

    Doxorubicin may make your urine a pink-red colour for up to 48 hours after you have had your treatment.

    Numb or tingling hands or feet (peripheral neuropathy)

    This treatment affects the nerves, which can cause numb, tingling or painful hands or feet. You may find it hard to fasten buttons or do other fiddly tasks.

    Tell your doctor if you have these symptoms. They sometimes need to lower the dose of vincristine. The symptoms usually improve slowly after treatment finishes, but for some people they may never go away. Talk to your doctor if you are worried about this.

    Muscle or joint pain

    You may get pain in your muscles or joints for a few days after treatment. If this happens, tell your doctor so they can give you painkillers. Tell them if the pain does not get better. Having warm baths and taking regular rests may help.

    Raised blood sugar levels

    Steroids can raise your blood sugar levels. Your nurse will check your blood sugar regularly for this. They may also test your urine for sugar. Symptoms of raised blood sugar include:

    • feeling thirsty
    • needing to pass urine often
    • feeling tired.

    Tell your doctor or nurse if you have these symptoms.

    If you have diabetes, your blood sugar levels may be higher than usual. Your doctor will talk to you about how to manage this. You may need to adjust your insulin or tablet dose.

    Tummy pain or indigestion

    Steroids can irritate the stomach lining. Tell your doctor or nurse if you have pain in your tummy (abdomen) or indigestion. They can give you drugs to help reduce stomach irritation. Take your tablets with food to help protect your stomach.

    Build-up of fluid

    You may put on weight or your ankles, legs and face may swell because of fluid building up. This is caused by steroids and is more common if you are taking them for a long time. Tell your doctor or nurse if fluid builds up. If your ankles and legs swell, it can help to put your legs up on a foot stool or cushion. The swelling gets better after your treatment ends.

    Skin changes

    R-CHOP may affect your skin. Your doctor or nurse can tell you what to expect. If your skin feels dry, try using an unperfumed moisturising cream every day. R-CHOP can cause a rash, which may be itchy. 
    During treatment, and for several months afterwards, you will be more sensitive to the sun. Your skin may burn more easily than usual. You can still go out in the sun, but use a suncream with a sun protection factor (SPF) of at least 30, and cover up with clothing and a hat.

    Your skin may darken. It will return to its normal colour after you finish treatment. If you have had radiotherapy (either recently or in the past), the area that was treated may become red or sore. 

    Always tell your doctor or nurse about any skin changes. They can give you advice and may give you creams or medicines to help. Any changes to your skin are usually temporary and improve when treatment finishes.

    Nail changes

    Your nails may grow more slowly or break more easily. You may notice white lines across your nails, or other changes to their shape or colour. Once the treatment has ended, any changes usually take a few months to grow out.

    There are things you can do to look after your nails:

    • Keep your nails and hands moisturised.
    • Wear gloves to protect your nails when you are doing things in the house or garden.
    • Do not use false nails during this treatment. It is fine to wear nail varnish.
    • If your toenails are affected, wear well-fitted shoes to cushion them.

    Raised levels of uric acid (tumour lysis syndrome)

    This treatment may cause the cancer cells to break down quickly. This releases uric acid (a waste product) into the blood. The kidneys usually get rid of uric acid, but may not be able to cope with large amounts. Too much uric acid can cause swelling and pain in the joints, which is called gout.

    Your doctor may give you drugs to help prevent this. Drinking at least 2 litres (3 ½ pints) of fluid a day will also help. You will have regular blood tests to check the uric acid levels.

    Effects on the kidneys and liver

    This treatment can affect how your kidneys and liver work. This is usually mild and goes back to normal after treatment. You will have blood tests to check how well your kidneys and liver are working.

    It is important to drink at least 2 litres (3½ pints) of fluids each day to help protect your kidneys.

    Jaw pain

    Vincristine may cause pain in your jaw. Tell your nurse or doctor if you notice this.

    Less common side effects

    Effects on the heart

    Chemotherapy can affect the way the heart works. You may have tests to see how well your heart is working. These may be done before, during and sometimes after treatment. If the treatment is causing heart problems, your doctor can change the type of chemotherapy you are having.

    Contact a doctor straight away if you:

    • have pain or tightness in your chest
    • feel breathless or dizzy
    • feel your heart is beating too fast or too slowly.

    Other conditions can cause these symptoms, but it is important to get them checked by a doctor.

    Effects on the lungs

    This treatment can cause changes to the lungs. Tell your doctor if you develop:

    • a cough
    • wheezing
    • a fever (high temperature)
    • breathlessness.

    You should also tell them if any existing breathing problems get worse. You may have tests to check your lungs.

    Mood and behaviour changes

    Steroids can affect your mood. You may feel anxious or restless, have mood swings or problems sleeping. Taking your steroids in the morning may help if you are having problems sleeping.

    Tell your doctor or nurse if you have any of these side effects. They may make some changes to your treatment if the side effects become a problem.

    Effects on the nervous system

    This treatment can affect the nervous system. You may feel dizzy or unsteady. Tell your doctor or nurse straight away if you notice any of these symptoms. They may make some changes to your treatment if they become a problem for you. It is important not to drive or operate machinery if you notice these effects. Rarely, this treatment can cause seizures (fits).

    Eye problems

    This treatment may make your eyes feel sore, red and itchy (conjunctivitis). Your doctor will prescribe eye drops to help prevent this. It is important to use these as you are told to.

    Rarely, vincristine may affect your vision. If you have pain or notice any change in your vision, always tell your doctor or nurse.

    Changes to your hearing

    Some people may notice some hearing loss or deafness. Your hearing usually gets better after treatment ends. But sometimes hearing loss can be permanent. Tell your doctor if you notice any changes to your hearing.

    Second cancer

    This treatment can increase the risk of developing a second cancer years later. This is rare. The benefits of treatment usually far outweigh this risk. Your doctor can talk to you about this.

    Other information

    Blood clot risk

    Cancer and some cancer treatments can increase the risk of a blood clot. Symptoms of a blood clot include:

    • pain, redness or swelling in a leg or arm
    • breathlessness
    • chest pain.

    If you have any of these symptoms, contact a doctor straight away.

    A blood clot is serious, but can be treated with drugs that thin the blood. Your doctor or nurse can give you more information.


    Your doctor or nurse may talk to you about vaccinations. These help reduce your risk of getting infections.

    Doctors usually recommend that you have a flu jab, which is an inactivated vaccination. People with weak immune systems can have this type of vaccination.

    If your immune system is weak, you need to avoid live vaccinations such as shingles. Your cancer doctor or GP can tell you more about live vaccinations.

    Food and medicines

    During treatment with cyclophosphamide you should avoid grapefruit and grapefruit juice. You should also not use the herbal remedy St John’s Wort. This is because they can make cyclophosphamide less effective and may increase side effects.

    Some medicines can affect chemotherapy or be harmful when you are having it. This includes medicines you can buy in a shop or chemist. Tell your cancer doctor about any drugs you are taking, including vitamins, herbal drugs and complementary therapies.


    Some cancer drugs can affect whether you can get pregnant or make someone pregnant.

    If you are a woman, your periods may become irregular or stop. This may be temporary, but for some women it is permanent. Your menopause may start sooner than it would have done.

    There may be ways to preserve fertility for men and women. If you are worried about fertility, it is important to talk with your doctor before you start treatment.


    Your doctor will advise you not to get pregnant or make someone pregnant while having this treatment. The drugs may harm a developing baby. It is important to use contraception during your treatment and for a while after treatment finishes. Your doctor, nurse or pharmacist can tell you more about this.


    If you have sex in the first few days after chemotherapy, you need to use a condom. This is to protect your partner in case there is any chemotherapy in semen or vaginal fluids.


    Women are advised not to breastfeed while having this treatment. This is because the drugs could be passed to the baby through breast milk.

    Medical and dental treatment

    If you need medical treatment for any reason other than cancer, always tell the doctors and nurses that you are having cancer treatment. Give them the contact details for your cancer doctor so they can ask for advice.

    If you think you need dental treatment, talk to your cancer doctor or nurse. Always tell your dentist you are having cancer treatment.