After reconstitution, each vial contains 0.3mg of Interferon Beta-1B in 1.2mL of solution (0.25mg/mL). Supplied in a carton containing 15 single-use carton packs. Each single-use pack contains the necessary components to prepare and inject a single dose of Betaseron: 1 vial of medication, 1 pre-filled diluent syringe (containing 1.2 mL of Sodium Chloride 0.54% solution), and 1 vial adapter with attached 30 gauge, ½" needle. Supplied with BETAJECT® Lite Autoinjector.