Each pre-filled syringe contains 44mcg of Interferon Beta-1a in 0.5mL of solution for injection (44mcg/0.5mL). Supplied in packs of three single-use pre-filled syringes. Normal maintenance dosage after initial titration is 44mcg injected subcutaneously three times per week. Keep refrigerated. Do not freeze. May be stored at room temperature up to 77F (25C) for up to one month.