AVONEX® (interferon beta-1a) is approved by FDA to treat relapsing forms of multiple sclerosis (MS) to decrease the number of flare-ups and slow the occurrence of some of the physical disability that is common in people with MS. AVONEX is approved for use in people who have experienced a first attack and have lesions consistent with MS on their MRI.
Important Safety Information
Before beginning treatment, you should discuss with your healthcare provider the potential benefits and risks associated with AVONEX® (interferon beta-1a). AVONEX can cause serious side effects including behavioral health problems (including depression, suicide or suicidal thoughts and hallucinations), liver problems (including liver failure and death), serious allergic reactions and skin reactions, heart problems (including heart failure), blood problems, seizures, infections, and thyroid problems. Let your healthcare provider know if you have a history of or are currently experiencing behavioral health problems, seizures, liver, thyroid, heart, or bleeding problems, autoimmune disease, low blood cell count, or if you have had previous allergic reactions to interferon beta. Tell your healthcare provider if you drink alcohol, are pregnant or plan to become pregnant, or if you are breastfeeding or plan to breastfeed, and all the medicines you currently take or have taken. You should not breastfeed while taking AVONEX. The most common side effects of AVONEX are flu-like symptoms (fever, chills, muscle aches, and tiredness) early during the course of therapy. Usually, these symptoms last for a day after the injection.
For additional important safety information, please see full Prescribing Information and Medication Guide.
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