Recombinant interferon beta-1b* 250 microgram (8.0 million IU) per ml when reconstituted.
Betaferon contains 300 microgram (9.6 million IU) of recombinant interferon beta-1b per vial.
* produced by genetic engineering from a strain of Escherichia coli.
Excipients/Inactive Ingredients: Vial (with powder for solution for injection): Human albumin, Mannitol.
Solvent (sodium chloride solution 5.4 mg/ml (0.54% w/v)): Sodium chloride, Water for injection.