Generic Name: Interferon beta-1b

  • What is Extavia?

    Extavia is a medicine used for relapsing forms of multiple sclerosis. Extavia will not cure multiple sclerosis, but can decrease the number of flare-ups. This medication is administered subcutaneously (just below the skin).

  • What is the most important information I should know about Extavia?

    Some patients treated with interferons, including Extavia, have experienced depression. Tell your doctor immediately if you are feeling sad or helpless, or feel like hurting yourself.

    Extavia can harm your unborn baby if you use it while you are pregnant. If you become pregnant, stop using this medication and tell your doctor.

    Extavia can cause severe allergic reactions leading to difficulty breathing or swallowing. Less severe reactions such as rash, itching, skin bumps, or swelling of your mouth and tongue can also occur. Tell your doctor immediately if you feel that you are having an allergic reaction to Extavia.

    Extavia can cause redness, pain, or swelling at the injection site. Serious skin reactions, including skin infections or areas of severe damage to your skin or tissue below your skin, can happen anywhere you inject Extavia. Tell your doctor immediately if you have a serious problem at any of your injection sites.

  • Who should not take Extavia?

    Do not use Extavia if you are allergic to it, any of its ingredients, or albumin (human).

  • What should I tell my doctor before I take the first dose of Extavia?

    Tell your doctor about all prescription, over-the-counter, and herbal medications you are taking before beginning treatment with Extavia. Also, talk to your doctor about your complete medical history, especially if you have a mental illness (including depression, anxiety, or trouble sleeping), thyroid gland problems, blood problems (such as bleeding or bruising easily), liver disease, or if you are pregnant, plan to become pregnant, or are breastfeeding.

  • What is the usual dosage?

    The information below is based on the dosage guidelines your doctor uses. Depending on your condition and medical history, your doctor may prescribe a different regimen. Do not change the dosage or stop taking your medication without your doctor's approval.

    Adults: The recommended dose is 0.25 milligrams (mg) every other day. Your doctor will start you on a lower dose and gradually increase it until you reach the recommended dose.

  • How should I take Extavia?

    Your doctor will decide when you or your caregiver can inject you with this medication. Your doctor will instruct you and/or your caregiver how to properly prepare and inject your dose of Extavia.

    It is important that you rotate your injection site each time you inject Extavia. Always use a new, unopened Extavia vial or prefilled syringe for each injection. Do not reuse the vials, syringes, or needles.

    Please review the instructions that came with your prescription on how to properly prepare and inject Extavia.

  • What should I avoid while taking Extavia?

    Do not become pregnant while you are using Extavia.

    Do not inject Extavia into an area of your body where the skin is red, bruised, infected, or scabbed; has broken open; or has lumps, bumps, or pain.

  • What are possible food and drug interactions associated with Extavia?

    No significant interactions have been reported with Extavia at this time. However, always tell your doctor about any medicines you take, including over-the-counter medications, vitamins, and herbal supplements.

  • What are the possible side effects of Extavia?

    Side effects cannot be anticipated. If any develop or change in intensity, tell your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking this drug.

    Side effects may include: allergic reactions, bleeding, bruising easily, depression, feeling cold or hot, feeling emotional, "flu-like" symptoms (such as chills, fever, muscle aches, sweating, or tiredness), headache, injection-site reactions, pain, right abdominal pain, thyroid problems, weakness, weight changes, yellowing of your skin or whites of your eyes

  • Can I receive Extavia if I am pregnant or breastfeeding?

    Extavia can harm your unborn baby if you use it while you are pregnant. Do not become pregnant while you are using Extavia. The effects of Extavia during breastfeeding are unknown. Tell your doctor immediately if you are pregnant, plan to become pregnant, or are breastfeeding.

  • What should I do if I miss a dose of Extavia?

    If you miss a dose of Extavia, inject it as soon as you remember. Inject your next dose about two days after that dose. Do not inject two doses at once.

  • How should I store Extavia?

    Before mixing, store at room temperature.

    After mixing, store in the refrigerator and inject it within 3 hours. Do not freeze.