Do not use a double dose of this medication. Seek emergency medical attention. Symptoms of an interferon beta-1a overdose are not known. There are no specific restrictions on food, beverages, or activities during treatment with interferon beta-1a. Follow any special instructions given by your doctor.
Flulike symptoms are likely to occur.
They are most common at the start of therapy and may decrease with continued use. Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome. It is not known if other drugs interact with interferon beta-1a. Your pharmacist has additional information about interferon beta-1a written for health professionals that you may read.