Beta interferons (Avonex, Betaferon; Extavia, Plegridy and Rebif)

MS is treated by drugs called disease modifying therapies (DMTs). Among the DMTs is a drug called beta interferon. There are five versions of it: Avonex, Plegridy, Betaferon, Extavia and Rebif.

This factsheet gives you more detailed information about this drug than you’ll find on our website pages or in our booklet about DMTs. It’s one of seven factsheets that cover the DMTs currently available in the UK.

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