EOF

EOF is the name of a combination of chemotherapy drugs used to treat stomach cancer and gastro oesphageal cancer. It is made up of the drugs

• Epirubicin
• Oxaliplatin
• Fluorouracil (5FU)

The links above take you to more information about the individual side effects of each drug.

You usually have EOF chemotherapy as cycles of treatment. Each cycle of treatment lasts 3 weeks. Depending on your needs, you may have up to 6 cycles, taking 4 to 5 months in total.

You have EOF drugs into your bloodstream (intravenously). You may have them through a central line, a portacath or a PICC line. These are long, plastic tubes that give the drugs directly into a large vein in your chest. You have the tube put in just before your course of treatment starts and it stays in place as long as you need it.

You have each cycle of treatment in the following way.

On the first day you have epirubicin as an injection into your central line or PICC line. You then have oxaliplatin as a drip (an infusion) over a couple of hours. Epirubicin is a red liquid.

You have the fluorouracil (5FU) non stop into your central line all the way through your treatment. You have a small portable pump which gives a continuous low dose of fluorouracil. You can go home with the pump and need to go back to the hospital every week to have it replaced or refilled.

Your next cycle of treatment then starts 3 weeks later when you have the epirubicin and oxaliplatin again.

The side effects of a combination of drugs are usually a mixture of those of each drug. The combination may increase or decrease your chance of getting each side effect or it may change the severity. The side effects associated with EOF are listed below. You can use the underlined links to find out more about each one. For general information, see our side effects of cancer drugs section.

More than 10 in every 100 people have one or more of the side effects listed below.

A temporary drop in the number of blood cells made by the bone marrow, causing

• Increased risk of getting an infection from a drop in white blood cells – it is harder to fight infections and you can become very ill. You may have headaches, aching muscles, a cough, sore throat, pain passing urine or feel cold and shivery
• Tiredness and breathlessness due to a drop in red blood cells (anaemia) – you may need a blood transfusion
• Bruising more easily due to a drop in platelets – you may have nosebleeds, bleeding gums after brushing your teeth or lots of tiny red spots or bruises on your arms or legs (known as petechia)

Some of these side effects can be life threatening, particularly infections. You should contact your treatment team if you have any of these effects. Your doctor will check your blood counts regularly to see how well your bone marrow is working.

Other common side effects include

• Epirubicin can turn your urine pink or red for about 1 day after treatment – this will not harm you
• Tiredness (fatigue) during and after treatment – most people find their energy levels are back to normal within 6 months to a year
• Diarrhoea in about 2 out of 3 people (60%) – drink plenty of fluids such as water and fruit squashes and tell your doctor or nurse immediately if diarrhoea becomes severe or continues for more than 3 days
• Feeling or being sick can be severe with epirubicin and oxaliplatin but is usually well controlled with anti sickness medicines. If your sickness is not controlled tell your doctor or nurse as they can change your anti sickness drugs to others that work better for you
• Some people develop soreness, redness and peeling on the palms of the hands and soles of the feet (palmar – plantar syndrome) which may cause tingling, numbness, pain and dryness
• Numbness or tingling in fingers and toes affects up to 2 out of 10 people (20%) and can cause difficulty with fiddly things such as doing up buttons – this starts within a few days or weeks and usually goes within a few months of finishing treatment
• A sore mouth
• This drug may have a harmful effect on a developing baby – do talk to your doctor or nurse about contraception before having treatment if there is any chance that you or your partner could become pregnant
• Women may stop having periods (amenorrhoea) but this may be temporary
• Loss of fertility – we don’t know exactly how this drug affects fertility so do talk with your doctor before starting treatment if having a baby is important to you
• Hair loss – you may have complete hair loss but the hair will grow back once the treatment ends
• Loss of taste or a metallic taste in your mouth
• Skin changes including rashes (which may be itchy) and darker skin
• Sensitivity of the skin to sunlight and redness or soreness in areas previously treated with radiotherapy

Between 1 and 10 in every 100 people have one or more of these.

• Difficulty swallowing or breathing can be triggered by cold air in the first 5 days after you have oxaliplatin but usually clears up on its own – tell your doctor or nurse if you have this side effect and avoid cold drinks or ice cubes for the first few days
• Inflammation around the drip site – if you notice any signs of redness, swelling or leaking at your drip site, tell your chemotherapy nurse immediately
• Sore eyes – your doctor or nurse can prescribe eye drops to help
• Blurred vision
• Watery eyes from increased production of tears
• Loss of appetite
• You may have ringing in the ears (tinnitus) which nearly always gets better on its own
• Some people have an allergic reaction while having EOF treatment, usually during the first or second treatment – let your treatment team know immediately if you have any skin rashes, itching, dizziness, headaches, shivering, shortness of breath, anxiety, or if you feel hot, go red in the face, or have a sudden need to pass urine

Fewer than 1 in 100 people have these.

• Swelling of hands and feet due to fluid build up
• Confusion or unsteadiness
• Damage to heart muscle from epirubicin, which is usually temporary but for a small number of people may be permanent – your doctor will check your heart before and after your treatment

You won't get all these side effects. Any that you have may be mild. A side effect may get worse through your course of treatment. Or you may have more side effects as the course goes on. This depends on

• How many times you've had a drug before
• Your general health
• How much of the drug you have (the dose)
• Other drugs you are having

Talk to your doctor, pharmacist or nurse about all your side effects so they can help you manage them. Your nurse will give you a contact number. You can ring if you have any questions or problems. They can give you advice or reassure you. If in doubt, call them.

Tell your doctor about any other medicines you are taking, including vitamins, herbal supplements and other over the counter remedies – some drugs can react together.

You should not have immunisations with live vaccines while you are having this treatment or for at least 6 months afterwards. In the UK, live vaccines include rubella, mumps, measles (usually given together as MMR), BCG and yellow fever. You can have other vaccines, but they may not give you as much protection as usual until your immune system has fully recovered.

It is safe for you to be in contact with other people who've had live vaccines as injections. There can be problems with oral vaccines, but not many people in the UK have oral vaccines now. So there is usually no problem in being with any baby or child who has recently had any vaccination in the UK. You might need to make sure that you aren't in contact with anyone who has had oral polio, cholera or typhoid vaccination recently, particularly if you live abroad.