An immune-modulating injection for certain rare conditions
Interferon gamma-1b
A specialist injection that adjusts the immune system, used in chronic granulomatous disease and severe osteopetrosis.
What is Interferon gamma-1b?
Interferon gamma-1b is a specialist injection that modifies how the immune system works. It is used mainly to reduce serious infections in chronic granulomatous disease, an inherited condition where infection-fighting cells do not work properly, and to help in severe (malignant) osteopetrosis, a rare bone disorder. It is given under the skin, often by the person or a carer after training. Flu-like symptoms such as fever, chills and aches are common, especially at first, along with reactions where the injection is given. It is used with caution in people with heart, nervous-system or liver problems, under specialist care.
Education and reference only. This is a plain-language guide to Interferon gamma-1b — it deliberately contains no doses. Doses depend on the person, the brand and the reason for treatment, and belong with your prescriber. Always check the BNF, the product labelling (SmPC) and follow medical advice.
What it is
Interferon gamma-1b is a man-made version of a natural immune-signalling protein called interferon gamma. It is used to adjust and strengthen parts of the immune system. Its main uses are in chronic granulomatous disease, an inherited condition in which the cells that fight infection cannot kill germs properly, leaving people prone to serious infections, and in severe (malignant) osteopetrosis, a rare disorder of bone. It is given as an injection under the skin and is prescribed and supervised by a specialist team, who can train patients or carers to give it.
How it works
Interferon gamma is a natural signal the immune system uses to switch on and coordinate infection-fighting cells. In chronic granulomatous disease, the cells that should destroy germs are faulty, so giving interferon gamma-1b helps boost the immune response and reduces how often serious infections happen. In severe osteopetrosis it helps the cells that remodel bone and supports immune function. Because it works on the immune system rather than directly killing germs, it is used regularly over time as a preventive and supportive treatment rather than as a one-off cure.
Company & origin
Originated / developed by: Specialist manufacturer.
A specialist injection used in the UK to help the immune system in chronic granulomatous disease and severe osteopetrosis.
Practical use
How to take Interferon gamma-1b
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- Use it as a regular injection under the skin on the schedule your specialist team sets, as you have been trained.
- Expect flu-like symptoms, especially early on; giving it in the evening and using paracetamol can help.
- Rotate the injection sites to reduce soreness, redness and swelling where it is given.
- Still seek medical care quickly for any fever or signs of infection, as this treatment does not replace treating infections.
- Tell your team about any heart, nervous-system or liver problems before and during treatment.
Weighing it up
Advantages & disadvantages of Interferon gamma-1b
Advantages
- Helps reduce serious infections in chronic granulomatous disease by boosting the immune response.
- Supports treatment in severe osteopetrosis, a rare bone disorder.
- Can be given at home as a self-injection after training.
Disadvantages
- Commonly causes flu-like symptoms such as fever, chills and aches, especially at first.
- Causes reactions where the injection is given, such as redness and soreness.
- Needs caution in people with heart, nervous-system or liver problems, and regular specialist monitoring.
Practical use
Good to know
The most useful thing to expect with interferon gamma-1b is flu-like symptoms: fever, chills, headache, tiredness and aches are common, especially when treatment is first started, and they often ease over time; your team may suggest giving the injection in the evening and using paracetamol to help. Reactions where the injection is given, such as redness, soreness or swelling, are also common, and rotating the injection site helps. It is used with caution in people with heart problems, nervous-system conditions such as seizures, or liver problems, because it can occasionally affect these, so tell your team about such conditions. It does not replace prompt treatment of any infection that occurs; people with chronic granulomatous disease should still seek care quickly for fevers or signs of infection. It is always used under specialist supervision with regular monitoring.
Who should not take it / use with caution
- People who have had a serious allergic reaction to interferon gamma-1b should not use it.
- It is used with caution in people with heart disease, seizures or other nervous-system conditions, or liver problems.
- It should only be used under specialist supervision, and advice should be sought in pregnancy and breastfeeding.
Monitoring
- Regular blood tests, including blood counts and liver function.
- Reviewing how well infections are being prevented and overall wellbeing.
- Watching for heart, nervous-system or mood effects, especially in people at higher risk.
Side effects
- Flu-like symptoms such as fever, chills, headache, tiredness and muscle or joint aches.
- Redness, soreness or swelling where the injection is given.
- Less commonly, effects on the liver blood tests, blood counts, or the heart and nervous system.
- Low mood or other mood changes in some people.
Key interactions
- It can add to the effects of some medicines on the bone marrow or liver, so the team reviews them.
- It may affect how some medicines are handled by the liver, so tell your team everything you take.
- Live vaccines and other immune-affecting treatments should be discussed with your specialist.
Available as: A solution for injection under the skin, often given by the patient or a carer.
Answers
Interferon gamma-1b: frequently asked questions
What is interferon gamma-1b used for?
It is a specialist injection that adjusts the immune system, used mainly to reduce serious infections in chronic granulomatous disease and to help in severe osteopetrosis.
Why do I feel like I have flu after the injection?
Flu-like symptoms such as fever, chills and aches are common, especially when starting; giving it in the evening and using paracetamol can help, and they often ease over time.
Can I inject it myself?
Yes, many people or their carers give it themselves under the skin after their specialist team has trained them.
Does it cure the infection risk?
It reduces how often serious infections happen but does not remove the risk, so you should still seek care quickly for any fever or signs of infection.
Are there conditions that need extra caution?
Yes. It is used with caution in people with heart, nervous-system or liver problems, so tell your team about these before and during treatment.
The wider class
About Interferon (immune modulator)
Interferon gamma-1b belongs to the interferon (immune modulator) class. For how the class as a whole works, its shared safety principles and monitoring, see the full guide.
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Authoritative sources
- BNF
- NICE CKS
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