G-CSF is a type of growth factor. You might have G-CSF after chemotherapy to help your white blood cells recover after treatment. Or you might have it before and after a stem cell transplant.
There are different types of G-CSF, including:
- lenograstim (Granocyte)
- filgrastim (Neupogen, Zarzio, Nivestim, Ratiograstim)
- long acting (pegylated) filgrastim (pegfilgrastim, Neulasta) and lipegfilgrastim (Lonquex)
Pegylated G-CSF stays in the body for longer so you have treatment less often than with the other types of G-CSF. This type of G-CSF is not commonly used in the NHS.
How it works
Growth factors are proteins made in the body. Some of them make the bone marrow produce blood cells. G-CSF is a type of growth factor that makes the bone marrow produce white blood cells to reduce the risk of infection after some types of cancer treatment.
G-CSF also makes some stem cells move from the bone marrow into the blood. Stem cells are the cells in the bone marrow that make red blood cells, white cells and platelets.
Before a stem cell transplant, you have G-CSF to stimulate the bone marrow to produce stem cells and release them into the blood. The stem cells are collected and then you have high dose chemotherapy.
The high dose of chemotherapy stops your bone marrow producing blood cells. So you have the stem cells back into your bloodstream. They go into the bone marrow and start making the different types of blood cells again.
How you have it
Most people have G-CSF as an injection under the skin. You can also have it as a drip into your bloodstream (intravenously).
Injection under your skin
You usually have injections under the skin (subcutaneous injection) into the stomach, thigh or top of your arm.
You might have stinging or a dull ache for a short time after this type of injection but they don't usually hurt much. The skin in the area may go red and itchy for a while.
The video below shows you how to give an injection just under your skin (subcutaneously).
Nurse: This is a short film showing you how to give an injection just under your skin. This is called a subcutaneous or sub cut injection. This does not replace what your doctors and nurses tell you, so always follow their advice.
Voiceover: Subcutaneous injections may be part of your cancer treatment. Or, you may need them to prevent side effects of treatment, such as blood clots after surgery. Or to help control cancer symptoms, such as pain or sickness.
Most injections come in prefilled syringes.
Nurse: So, today I am going to show you how to give a subcutaneous injection. I am going to start by giving it into a practice cushion and then you can have a go at giving one yourself. Before you start, you need to get your equipment together. What you are going to need is an alcohol wipe to clean your skin, some cotton wool, a prefilled syringe and a sharps bin. It is important that you wash your hands with soap and water and dry them thoroughly before you start. Check that you have got the correct drug and that it is in date.
You can give the injection into the back of your arm, your tummy, your thigh or the outer part of your bottom. It is important that you vary where you give the injection. So it may be that you give it one day in your tummy and the next in your thigh.
So you start by cleaning the skin with the alcohol wipe and allowing it to air dry. Then you take the cover off the needle and pinch the skin up and hold it a bit like a pen and in an upright position, in a quick dart like motion pop it straight down into the skin. Then you press the plunger right to the end, quickly pull the needle out, dab it with cotton wool, pop the needle into the sharps bin. And then you need to wash your hands again.
So here’s what you are going to need. If you start by checking the drug and the expiry date. And then with the alcohol wipe give your skin a clean. That’s it give it a few seconds for the air to dry it. Ok and then if you want to pick up the syringe and take the cover off the needle. Then pinch your skin up and at a ninety degree angle gently push the needle in...then press the plunger...and then quickly remove it... dab your skin with the cotton wool and put the syringe in the sharps bin.
Into your bloodstream
You have the treatment through a drip into your arm or hand. A nurse puts a small tube (a cannula) into one of your veins and connects the drip to it.
You might need a central line. This is a long plastic tube that gives the drugs into a large vein, either in your chest or through a vein in your arm. It stays in while you’re having treatment, which may be for a few months.
You have blood tests before and during your treatment. They check your levels of blood cells and other substances in the blood. They also check how well your liver and kidneys are working.
We haven't listed all the side effects. It is very unlikely that you will have all of these side effects, but you might have some of them at the same time.
How often and how severe the side effects are can vary from person to person. They also depend on what other treatment you are having. For example, your side effects could be worse if you are also having other drugs or radiotherapy.
When to contact your team
Your doctor or nurse will go through the possible side effects. They will monitor you closely during treatment and check how you are at your appointments. Contact your advice line as soon as possible if:
- you have severe side effects
- your side effects aren’t getting any better
- your side effects are getting worse
Common side effects
These side effects happen in more than 10 in 100 people (10 %). You might have one or more of them. They include:
You might have liver changes that are usually mild and unlikely to cause symptoms. They usually go back to normal when treatment finishes. You have regular blood tests to check for any changes in the levels of chemicals produced by the liver.
You might experience pain in your bones. Speak to your doctor as they can prescribe medicine to help.
Tell your doctor or nurse if you keep getting headaches. They can give you painkillers to help.
Tiredness and weakness (fatigue)
Tiredness and weakness (fatigue) can happen during and after treatment - doing gentle exercises each day can keep your energy up. Don't push yourself, rest when you start to feel tired and ask others for help.
You might feel some pain from your muscles and joints. Speak to your doctor or nurse about what painkillers you can take to help with this.
High white blood cell count
You will have regular blood tests to check for this.
Bruising, bleeding gums or nosebleeds
This is due to a drop in the number of platelets in your blood. These blood cells help the blood to clot when we cut ourselves. You may have nosebleeds or bleeding gums after brushing your teeth. Or you may have lots of tiny red spots or bruises on your arms or legs (known as petechia).
Contact your advice line if you have diarrhoea, that is 4 loose watery poos (stools) in 24 hours. Or if you can't drink to replace the lost fluid, or if it carries on for more than 3 days. Your doctor may give you anti diarrhoea medicine to take home with you after treatment. Eat less fibre, avoid raw fruits, fruit juice, cereals and vegetables, and drink plenty of liquid to replace the fluid lost.
Feeling or being sick
Feeling or being sick is usually well controlled with anti sickness medicines. Avoiding fatty or fried foods, eating small meals and snacks, drinking plenty of water, and relaxation techniques, can all help.
High temperature (fever)
If you get a high temperature, let your treatment team know straight away. Ask them if you can take paracetamol to help lower your temperature.
Occasional side effects
These side effects happen in between 1 and 10 out of every 100 people (1 to 10%). You might have one or more of them. They include:
- enlarged spleen
- inflammation around the injection site
- tummy (abdominal) pain
- swollen hands and feet (oedema)
- skin rash
- difficulty sleeping (insomnia)
- breathlessness and cough
- pain passing urine
Rare side effects
Each of these effects happens in fewer than 1 out of 100 people (1%). You might have one or more of them They include:
- allergic reaction
- capillary leak syndrome
Coping with side effects
We have more information about side effects and tips on how to cope with them.
What else do I need to know?
Other medicines, foods and drink
Cancer drugs can interact with some other medicines and herbal products. Tell your doctor or pharmacist about any medicines you are taking. This includes vitamins, herbal supplements and over the counter remedies.
Pregnancy and contraception
This treatment might harm a baby developing in the womb. It is important not to become pregnant or father a child while you're having treatment and for a few months afterwards. Talk to your doctor or nurse about effective contraception before starting treatment.
Don’t breastfeed during this treatment because the drug may come through into your breast milk.
Treatment for other conditions
Always tell other doctors, nurses, pharmacists or dentists that you’re having this treatment if you need treatment for anything else, including teeth problems.
You need to keep your ready-filled syringes in the fridge between 2 and 8°C, except for lenograstim, which is stored at room temperature.
More information about this treatment
For further information about this treatment go to the electronic Medicines Compendium (eMC) website.
You can report any side effect you have to the Medicines Health and Regulatory Authority (MHRA) as part of their Yellow Card Scheme.