5 Fluorouracil /
Your doctor has explained that you have colorectal cancer and has recommended treatment with chemotherapy.
The chemotherapy drug you are going to have is called 5 Fluorouracil (5FU). This is given together with a drug called Folinic Acid (FA) which increases the efficacy of the 5FU in killing cancer cells. Both drugs are given by injection into a vein in your arm once a week. The number of injections you will receive should have been explained to you by your doctors.
You will have your blood count checked before starting chemotherapy and during treatment. If the blood count is low the chemotherapy may be delayed.
The side-effects described below will not effect everyone. We have outlined those that you may experience during treatment. Your clinic will usually work with you to keep your side-effects to a minimum. It is important that you feel free to ask questions to that you understand what is happening, what to do and what to expect. You should also receive additional information instructing you what to do if you feel unwell including who to contact and their telephone numbers. Occasionally people have rare side-effects which are not expected and mentioned on this sheet. If in doubt ask!
Nausea & sickness; This treatment does not normally cause any sickness but you may be given anti-sickness tablets to take home to take if required. Over the whole course of the chemotherapy, although you may not be physically sick your appetite may be reduced and you may loose weightIf your blood counts falls you may experience the following:
Other advice on paracetamol; As mentioned above, if you have a temperature and feel unwell you may have an infection and may need treatment in hospital, we advise not to take paracetamol in this situation as it may mask your temperature, give false reassurance and delay you presenting to hospital for treatment. Taking paracetamol can otherwise be used with discretion. If for example you have a headache or a mild pain but otherwise feel well and your temperature is normal paracetamol can be used provided you check your temperature before each dose and allow a full six hours before each administration.
Contact to chicken pox; If you can't remember whether you've had Chicken Pox as a child and you come in contact with a person who as it or shingles you should contact your oncology team. They will arrange a blood test to find out if you are immune to chicken pox (the varcella virus). If not a series of injections can be administered to offer you temporary immunity.
Fatigue; All chemotherapy can cause fatigue. As your treatment progresses you will experience this. You may find that gentle exercise such as a short walk each day (if you are not working) may help. Fatigue and malaise may last up to 2-3 months (or longer) after the end of chemotherapy.
Weight gain; Over the entire course of chemotherapy many patients complain of weight gain. This is caused by a combination of the steroids increasing the appetite, the fatigue causing lack of mobility and the mild nausea often encouraging to nibble rather than eating correct meals - In order to prevent this we recommend regular light exercise and be aware of your calorie intake.
Weight loss may also be experienced by some patients during their course of chemotherapy particularly if there is more advances disease or other medical problems, in these cases dietary advice should be sought.
mouth; You may have a sore
mouth after chemotherapy and it is important that you maintain good
oral hygiene. A soft, baby toothbrush may help and you may be given a mouthwash.
If you develop mouth ulcers
you should contact your clinic and they can prescribe special mouthwashes to
Hair loss; This chemotherapy does cause hair loss. It usually starts 3-4 weeks after the first course and may be lost completely. You may also experience thinning and loss of eyelashes, eyebrows and other body hair. This is temporary and your hair will regrow after treatment, although it may at first be a different texture, very like a baby's hair. Some departments use a cold cap system to minimise hair loss. Your clinic nurse can arrange for you to have a wig before your treatment starts (NHS prescription charge, prices are approximately £55 for an acrylic wig, £140 for half real hair wig and £205 for a full real hair wig).
Premature menopause; For pre-menopausal women, chemotherapy may affect your periods. They may become heavier, lighter or may stop. In some women this may be permanent causing menopausal symptoms. You should not become pregnant during chemotherapy, as chemotherapy will damage a growing baby. You should still take contraceptive precautions even if your periods have stopped, as you could still become pregnant.
Steroids; This chemotherapy is given with steroids (e.g. Dexamethasone) to help prevent sickness. Steroids have some side effects, including fluid retention, weight gain, wakefulness and sometimes agitation. If you suffer from indigestion you may be given tablets to prevent this. If patients are prone to "spots" or acne this can be made worse. Likewise they can temporarily upset diabetes or high blood pressure.
Diarrhoea; This chemotherapy can cause diarrhoea, which can be easily controlled with medicine, but you should inform your doctor if it is severe or continues. It is important to drink plenty of fluids if you do get diarrhoea. If you have any alteration in bowel pattern tell your doctor.
Sensitive eyes; You may find your eyes become more sensitive to light and that they start "watering". If this occurs your clinic may prescribe you some eye drops.
Increase risk of blood clots - during chemotherapy there is an increased risk of blood clots, most commonly in the legs (deep vein thrombosis) or more seriously to the lungs (pulmonary embolus). If you get unexplained swelling and discomfort in the calf report this to the oncology unit. Likewise if you start experiencing unexplained breathlessness, cough up any blood or have a pain in the chest particularly when you breath contact the clinic as soon as possible. To avoid clots its important to stay as active as possible and (exercise & chemotherapy) taking light walks two to three times a day and avoid sitting around for long periods of time. If you are required to sit (for example while receiving the chemotherapy drugs) try to move your legs and ankles regularly. Occasionally, if your doctor feels you are at high risk of developing clots you may be started on drugs to thin your blood during chemotherapy.
Sore eyes; The front of the eyes (cornea) can occasionally feel dry and sticky, especially first thing in the morning. This usually comes on later in the course and can cause some redness and discomfort. Eye drops such artificial tears can be bought over the counter or prescribed by your medical team.
Nails; The grow of the nails can be impaired by chemotherapy. The amount of damage can vary but in most case there will be some slight discolouration and indentation seen in ridges across the nail beds - a bit like the rings of a tree, each representing an individual chemotherapy cycle. Occasionally the damage can be more troublesome, causing pain and breakdown of the nail bed causing it to lift and separate, possibly even leading to a total loss of the nail. Eventually after chemotherapy has finished the nail will grow back normally.
Further general information Your doctors and specialist nurses are in an ideal position to give you relevant information on your disease and treatment as they know your individual circumstances. Cancerbackup has a help line (0808 800 1234) and a prize winning video available in English, Italian, Urdu, Bengali, Gujarati & Hindi explaining Radiotherapy & Chemotherapy. Cancernet.co.uk has over 500 pages describing cancer, its management, practical tips and tool which patients, their carers and their doctors have found helpful during the cancer journey.
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