Each 15 ml vial of concentrate contains 300 mg natalizumab (20 mg/ml). When diluted, the solution for infusion contains approximately 2.6 mg/ml of natalizumab.
Excipients/Inactive Ingredients: Sodium phosphate, monobasic, monohydrate; Sodium phosphate, dibasic, heptahydrate; Sodium chloride (see Precautions); Polysorbate 80 (E433); Water for injections.