A to Z of MS Beta interferon 1a
Product name
Avonex
Avonex is one of the disease modifying drugs licensed for relapsing/remitting MS. These drugs are often referred to collectively as the beta interferons. Studies have shown that on average Avonex reduces the relapse rate in people with relapsing/remitting MS by about a third and also reduces the severity of those relapses that do occur.
How beta interferon works
Interferons are proteins that occur naturally in the immune system. It is thought that beta interferon acts by reducing both inflammation and the immune response that is attacking the body's own myelin.
How is Avonex given?
Avonex is injected into a muscle once a week.
Side effects and contraindications
Flu like symptoms following injections. These tend to reduce over time and are usually no longer a problem after three months on treatment.
Reference
Jacobs LD, et al.
Intramuscular interferon beta 1-a for disease progression in relapsing multiple sclerosis.
Annals of Neurology 1995;39:285-294
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