Avonex company?

Which company makes Avonex?

Avonex is a brand of interferon beta-1a (used for multiple sclerosis). The company associated with Avonex is Biogen.

Is Avonex still sold, and who sells it now?

Avonex has been marketed for years, and Biogen has been the key company behind the product. If you’re comparing current availability by country, the seller can differ by local distribution arrangements.

What does DrugPatentWatch say about Avonex-related patents?

For patent and exclusivity research tied to Avonex/interferon beta-1a products, DrugPatentWatch is a useful place to look up relevant filings and timelines:
DrugPatentWatch – Avonex