An anti-FcRn antibody for generalised myasthenia gravis
Rozanolixizumab
A specialist antibody medicine used to treat generalised myasthenia gravis by lowering the harmful antibodies that cause muscle weakness.
What is Rozanolixizumab?
Rozanolixizumab is a specialist medicine used to treat generalised myasthenia gravis, a condition in which the body's own antibodies attack the connection between nerves and muscles, causing muscle weakness and fatigue. It is used in adults who test positive for anti-AChR or anti-MuSK antibodies, given as an injection under the skin in treatment cycles. It works by speeding up the removal of harmful antibodies. Because it also lowers protective antibodies, the most important risk is a greater chance of infections; it can also cause headache (sometimes from aseptic meningitis) and reactions to the injection or infusion. It is given under specialist care.
Education and reference only. This is a plain-language guide to Rozanolixizumab — 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
Rozanolixizumab is an antibody medicine used to treat generalised myasthenia gravis in adults, a long-term condition in which the immune system makes antibodies that block or damage the signal between nerves and muscles, leading to weakness that gets worse with activity. It is used specifically in people who test positive for anti-AChR or anti-MuSK antibodies. It is given as an injection under the skin, usually in cycles of treatment rather than continuously, and is prescribed and supervised by a specialist neurology service.
How it works
Myasthenia gravis is driven by harmful antibodies that attack the nerve-to-muscle junction. Rozanolixizumab blocks a protein called the neonatal Fc receptor (FcRn), which normally protects antibodies from being broken down. By blocking it, the medicine speeds up the removal of antibodies from the blood, including the harmful ones that cause the disease, so muscle strength can improve. Because this lowering affects antibodies in general, including the protective ones that fight infection, the effect is temporary and treatment is given in cycles, with strength reviewed over time.
Company & origin
Originated / developed by: Specialist manufacturer.
A specialist medicine used in the UK to treat generalised myasthenia gravis in adults who test positive for certain antibodies.
Practical use
How to take Rozanolixizumab
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- It is given as an injection under the skin in treatment cycles, arranged and supervised by your specialist team.
- Report any signs of infection, such as fever, sore throat or feeling unwell, to your team promptly.
- Seek urgent medical help for a severe headache with neck stiffness, fever or sensitivity to light, as this can be aseptic meningitis.
- Keep to the cycle schedule your specialist team sets rather than expecting daily treatment.
- Make sure your vaccinations are up to date before starting, as advised by your team.
Weighing it up
Advantages & disadvantages of Rozanolixizumab
Advantages
- Can improve muscle strength in generalised myasthenia gravis by lowering the harmful antibodies that cause it.
- Given as an injection under the skin in cycles, rather than continuously.
- An option for adults who test positive for anti-AChR or anti-MuSK antibodies.
Disadvantages
- Lowers protective antibodies too, so it raises the risk of infections.
- Can cause headache, and rarely a non-infectious meningitis (aseptic meningitis) that needs urgent care.
- Needs specialist supervision and is given in repeated treatment cycles.
Practical use
Good to know
The most important thing to understand is that rozanolixizumab lowers antibodies across the board, including the protective ones that help fight infection, so the main safety concern is a higher risk of infections; any fever, sore throat or signs of infection should be reported promptly. A specific reaction to know about is aseptic meningitis, a non-infectious inflammation around the brain that can cause severe headache, neck stiffness, fever or sensitivity to light and needs urgent medical attention. Reactions linked to the injection, such as headache, can also happen. It is given in treatment cycles rather than every day, and the specialist team plans when cycles are repeated based on how well symptoms are controlled. Your team will check you are up to date with relevant vaccinations and will watch for infection during treatment.
Who should not take it / use with caution
- People who have had a serious allergic reaction to rozanolixizumab should not use it.
- It is used with care in people with an active infection, which may need treating first.
- It should only be used under a specialist neurology service, with monitoring for infection.
Monitoring
- Watching for signs of infection during and after treatment cycles.
- Reviewing muscle strength and symptoms to decide when cycles are repeated.
- Checking vaccination status and watching for any signs of aseptic meningitis.
Side effects
- Headache, which is common and is sometimes linked to a non-infectious meningitis.
- A higher chance of infections, because protective antibodies are also lowered.
- Reactions to the injection or infusion, and diarrhoea or nausea in some people.
Key interactions
- Because it lowers antibody levels, it may reduce the effect of some antibody-based medicines, so tell your team about all your medicines.
- Live vaccines may be less suitable during treatment, so vaccination plans are discussed with your team.
- Tell your team about any other medicines that affect the immune system.
Available as: A solution for injection under the skin, given in treatment cycles.
Answers
Rozanolixizumab: frequently asked questions
What is rozanolixizumab used for?
It is used to treat generalised myasthenia gravis in adults who test positive for anti-AChR or anti-MuSK antibodies, by lowering the harmful antibodies that cause muscle weakness.
Why does it raise the risk of infection?
It lowers antibodies in general, including the protective ones that help fight infection, so you may be more prone to infections and should report any signs promptly.
What is aseptic meningitis and what should I watch for?
It is a non-infectious inflammation around the brain that can cause severe headache, neck stiffness, fever or sensitivity to light; seek urgent medical help if these happen.
How is it given?
It is given as an injection under the skin in treatment cycles, arranged and supervised by your specialist neurology team, rather than every day.
Do I need vaccinations before starting?
Your team will check your vaccinations are up to date before treatment, as the medicine can affect how you respond to infection.
Authoritative sources
- BNF
- NICE CKS
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