interferon beta-1b at a glance
Medicine class
Interferon; immunomodulating disease-modifying treatment
Main role
Selected active relapsing forms of MS and some people at high risk after a first demyelinating event
Administration
Subcutaneous injection after reconstituting the powder with the supplied solvent
Routine care
Injection sites should be rotated; blood counts and liver function require monitoring
What is interferon beta-1b used for?
The product is licensed for defined active MS presentations.
A first demyelinating event with active inflammation that required intravenous corticosteroids, after excluding alternative diagnoses, when the person is at high risk of clinically definite MS
Relapsing-remitting MS with at least two relapses during the previous two years
Secondary progressive MS with active disease shown by relapses
How does interferon beta-1b work?
Interferon beta-1b binds to interferon receptors on human cells and changes expression of immune-related genes. Its precise effect in MS is not fully understood, but it modifies immune activity involved in inflammatory damage to myelin and nerves.
How to take interferon beta-1b
Use only after training by the MS team and follow the supplied injection instructions. Reconstitute the powder only with the supplied solvent, use sterile technique, inspect the prepared solution for particles or discolouration, and inject under the skin. Rotate injection sites and do not inject into damaged or infected skin.
Do not shake the vial while dissolving the powder.
A suitable autoinjector may be used if recommended and demonstrated by the clinical team.
Do not freeze the product.
interferon beta-1b side effects
Common or expected effects
- Flu-like symptoms, including fever, chills, headache, sweating and muscle or joint pain
- Injection-site redness, pain, swelling, inflammation or discolouration
- Headache, difficulty sleeping, abdominal pain, rash or weakness
- Reduced white blood cells or raised liver enzymes detected by blood tests
Get urgent medical advice
- Severe allergic reaction with facial or tongue swelling or sudden breathlessness
- Severe depression or suicidal thoughts
- Serious liver injury, blood-cell disorders or kidney problems
- Injection-site infection or tissue death
- Pancreatitis, cardiomyopathy, thrombotic microangiopathy or haemolytic anaemia
- Pulmonary arterial hypertension, which may develop after prolonged exposure
interferon beta-1b in pregnancy
Interferon beta may be used during pregnancy when recommended by an MS specialist. Available human experience has not raised concern about congenital harm. Contact the specialist team before changing treatment because of pregnancy.
interferon beta-1b while breastfeeding
Transfer into breast milk is expected to be negligible, and harmful effects in a breastfed child are not anticipated. The product information permits use during breastfeeding; discuss individual circumstances with the specialist team.
interferon beta-1b interactions
Formal interaction studies are limited. Tell the prescriber about all medicines, including non-prescription products.
Other immunomodulators
Combined use is not recommended because clinical experience is lacking, apart from corticosteroids or ACTH used for relapses.
Narrow-therapeutic-index medicines cleared by hepatic cytochrome P450, including some antiepileptics such as phenytoin
Interferons may reduce hepatic enzyme activity, so additional clinical or laboratory monitoring may be needed.
Medicines affecting blood-cell production
Combined effects may increase blood-count abnormalities and require closer monitoring.
Common questions about interferon beta-1b
Answers are fully visible for fast scanning and source review.
Can interferon beta-1b cure multiple sclerosis?
No. It modifies disease activity and may reduce relapses in suitable patients, but it does not cure MS or reverse established nerve damage.
Does it treat an MS relapse immediately?
It is a disease-modifying treatment rather than rapid relief for an established relapse. Relapses may require separate assessment and treatment.
Why are blood tests needed?
It can alter blood-cell counts and liver chemistry. Tests help identify clinically important changes before symptoms develop.
Can it affect mood?
Yes. New or worsening depression and suicidal thoughts require prompt contact with the prescriber; seek emergency help if there is immediate danger.
Sources
These sources were used to prepare and review this medicine page.
Prepared and reviewed by the iatroX editorial team.