Extavia

Generic name:interferon beta-1b [ in-ter-FEAR-on-BAY-ta-1b ]
Drug class:Interferons

Medically reviewed by Judith Stewart, BPharm. Last updated on Nov 12, 2020.

What is Extavia?

Extavia is made from human proteins. Extavia is similar to certain interferon proteins that are produced in the body. Interferons help the body fight viral infections.

Extavia is a prescription medicine used to treat relapsing forms of multiple sclerosis (MS). This medicine will not cure MS, but it may decrease flare-ups.

It is not known if Extavia is safe and effective in children. .

Warnings

Extavia may be harmful to an unborn baby, or may cause a miscarriage. Do not use Extavia if you are pregnant. Tell your doctor if you are pregnant or plan to become pregnant during treatment.

Before using Extavia, tell your doctor if you are allergic to any drugs, or if you have liver disease, a thyroid disorder, epilepsy or other seizure disorder, a bleeding or blood-clotting disorder, anemia (low red blood cells), or a history of depression or suicidal behavior.

Some people have thoughts about suicide while taking interferon beta-1b. Stay alert to changes in your mood or symptoms. Report any new or worsening symptoms to your doctor.

Interferon beta-1b can harm your liver. Call your doctor at once if you have nausea, vomiting, itching, bruising or bleeding, or yellowing of your skin or eyes.

To be sure Extavia is not causing harmful effects, your blood and liver function will need to be tested on a regular basis. Your thyroid function may also need to be tested. Do not miss any scheduled appointments.

Before taking this medicine

You should not use Extavia if you are allergic to interferon beta, albumin, or mannitol.

To make sure Extavia is safe for you, tell your doctor if you have:

• liver disease;

• heart problems;

• a seizure;

• depression, anxiety, or sleep problems;

• a bleeding or blood-clotting disorder;

• low white blood cell (WBC) counts;

• anemia (lack of red blood cells); or

• an allergy to latex.

Tell your doctor if you are pregnant or breastfeeding.

How should I use Extavia?

Use Extavia exactly as prescribed by your doctor. Follow all directions on your prescription label and read all medication guides or instruction sheets. Your doctor may occasionally change your dose.

Extavia is injected under the skin, usually every other day. A healthcare provider may teach you how to properly use the medication by yourself.

Read and carefully follow any Instructions for Use provided with your medicine. Ask your doctor or pharmacist if you don't understand all instructions.

Prepare an injection only when you are ready to give it. Do not use if the med...