Tecfidera® (dimethyl fumarate)

Welcome to Tecfidera

A pill for relapsing multiple sclerosis

With Tecfidera, now is a good time to take on relapsing MS. Tecfidera is a pill that helps you push back on relapsing MS in different ways; it has been shown in a study to cut relapses in half*, delay progression of physical disability, and slow the development of brain lesions. The side effects of Tecfidera were documented in clinical studies and post FDA approval. Learn more about Tecfidera and how Biogen Idec, the company behind Tecfidera, provides support services to help you manage your relapsing MS.

*During a 2-year study, Tecfidera cut relapses in half, reducing the risk and number of relapses by 49%.

About Tecfidera

Tecfidera is approved by the FDA to treat people with relapsing MS. See how Tecfidera can help reduce relapses, delay physical disability progression, and slow the development of brain lesions… More

Biogen Idec Support

Connect with other people who are living with relapsing MS, expand your care partner's network, learn about the ActiveAccess $0 Copay Program from Biogen Idec, and find MS events in your area… More

Relapsing MS

Knowing the signs and symptoms of MS and understanding the different treatment options for relapsing MS is crucial. Knowledge can help you and your doctor manage your relapsing MS… More

Why I chose Tecfidera

See why real patients and their healthcare providers chose to treat their relapsing MS with Tecfidera.

Watch the video

Send me a Tecfidera information kit

Get more information about Tecfidera. Share it with someone or take it with you to your next doctor appointment.

Request an information kit

Learn about the $0 Copay Program from Biogen Idec

Some people pay as little as $0 a month for their Tecfidera prescription. Depending on your income or, in some cases, if your medication is obtained from an out-of-network provider, there may be an annual cap that limits the amount of assistance that you can receive over one year.

Get the details here

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TECFIDERA (dimethyl fumarate) is a prescription medicine used to treat people with relapsing forms of multiple sclerosis.

Important Safety Information

Important Safety Information and Indication

Do not use TECFIDERA if you have had an allergic reaction (such as welts, hives, swelling of the face, lips, mouth or tongue, or difficulty breathing) to TECFIDERA or any of its ingredients.

Before taking and while you take TECFIDERA, tell your doctor about any low white blood cell counts or infections or any other medical conditions.

What are the possible side effects of TECFIDERA?

TECFIDERA may cause serious side effects including allergic reactions, PML, which is a rare brain infection that usually leads to death or severe disability, and decreases in your white blood cell count. Your doctor may check your white blood cell count before you take TECFIDERA and from time to time during treatment.

The most common side effects of TECFIDERA include flushing and stomach problems. These can happen especially at the start of treatment and may decrease over time. Taking TECFIDERA with food may help reduce flushing. Call your doctor if these symptoms bother you or do not go away. Ask your doctor if taking aspirin before taking TECFIDERA may reduce flushing.

These are not all the possible side effects of TECFIDERA. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. For more information go to dailymed.nlm.nih.gov.

Tell your doctor if you are pregnant or plan to become pregnant, or breastfeeding or plan to breastfeed. It is not known if TECFIDERA will harm your unborn baby or if it passes into your breast milk. Also tell your doctor if you are taking prescription or over-the-counter medicines, vitamins, or herbal supplements.

For additional important safety information, please see full Prescribing Information and Patient Information. This is not intended to replace discussions with your doctor.