Read the Medication Guide, Patient Safety Information Card, and, if available, the Patient Information Leaflet provided by your pharmacist before you start using alemtuzumab and each time you receive treatment with this drug. Carry the Patient Safety Information Card with you at all times. If you have any questions, ask your doctor or pharmacist.

This medication is given by injection into a vein over at least 4 hours by a health care professional. It should be given over 2 treatment courses. The first treatment course is usually given daily for 5 days while the second treatment course is usually given daily for 3 days. The treatment courses should be separated by 12 months. Additional treatment courses of 3 days may be given if needed, but should be separated by at least 12 months from the previous treatment.

Before you receive this medication, your doctor will direct you to take other medications (such as acetaminophen, diphenhydramine, corticosteroids, antiviral medication) to help prevent side effects and infection. Use these additional medications exactly as prescribed by your doctor.