Alglucosidase alpha enzyme, also known as Alglucosidase alfa or enzyme replacement therapy (ERT), is a medication used to treat Pompe disease. Pompe disease is a rare genetic disorder that affects the muscles and can cause respiratory and cardiac failure. Alglucosidase alpha enzyme works by replacing the missing or deficient enzyme in patients with Pompe disease. The medication is administered intravenously, and the dosage and frequency of administration are determined by the patient's weight and the severity of the disease.