Solu-Medrol is a methylprednisolone sodium succinate sterile powder with diluent for injection, available in 40 mg and 125 mg Act-O-Vial single-dose vials. Designed for intramuscular or intravenous use, it delivers a corticosteroid option in a convenient, reconstitutable format. The Act-O-Vial presentation helps streamline preparation and single-dose administration. Prescription required in Canada.