Read the Medication Guide provided by your pharmacist before you start using this drug and each time you get a refill. If you have any questions, consult your doctor or pharmacist.

This medication is given by injection into a muscle or under the skin as directed by your doctor. It is best used in the evening before bedtime to reduce side effects. Change the injection site each time to lessen injury under the skin. This medication may also be given by injection into a vein or directly into a lesion, usually by a health care professional. The dosage is based on your medical condition and response to treatment.

If you are giving this medication to yourself at home, learn all preparation and usage instructions from your health care professional. Do not shake the medication. Before using, check this product for particles or discoloration. If either is present, do not use the liquid. Learn how to store and discard medical supplies safely.

Drink plenty of fluids while using this medication unless otherwise directed by your doctor.

Use this medication regularly to get the most benefit from it. To help you remember, use it at the same time each evening that you have a scheduled dose.

Different brands of interferon alfa can result in different amounts of medication in the blood. This medication comes in different forms (a powder in a vial, a solution in a vial, and a multidose pen). The way you inject this medication depends on the form you are using. Follow your doctor's directions carefully. Do not switch brands without your doctor's permission.