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What is TECFIDERA?

Saying yes to Tecfidera® (dimethyl fumarate) could lead to fewer relapses

Taken as one pill twice a day, TECFIDERA was proven to work against relapsing multiple sclerosis (MS) in clinical trials. Learn about its potential benefits and risks, and get tools and tips to help you have a productive conversation with your healthcare professional.

TECFIDERA clinical trial results
TECFIDERA effectiveness

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of clinical trials.

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TECFIDERA Safety and side effects
TECFIDERA safety

Find out about the potential side effects of TECFIDERA.

Learn about safety
Talking to your healthcare professional
Talking to your heathcare professional

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materials you can bring to your next appointment.

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*In the US. Based on number of prescriptions from IMS NPA™ Weekly Data (September 27, 2013 – September 7, 2018).

IMPORTANT SAFETY INFORMATION

Do not use Tecfidera® (dimethyl fumarate) 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.
  • Decreases in your white blood cell count. Your doctor should check your white blood cell count before you take TECFIDERA and from time to time during treatment
  • Liver problems. Your doctor should do blood tests to check your liver function before you start taking TECFIDERA and during treatment if needed. Tell your doctor right away if you get any symptoms of a liver problem during treatment, including:
    • severe tiredness
    • loss of appetite
    • pain on the right side of your stomach
    • dark or brown (tea color) urine
    • yellowing of your skin or the white part of your eyes

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. If you take too much TECFIDERA, call your doctor or go to the nearest hospital emergency room right away.

Please see full Prescribing Information and Patient Information.

This is not intended to replace discussions with your doctor. 

Indication

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

WHAT IS TECFIDERA? Effectiveness Safety Talking to your healthcare professional
STARTING TECFIDERA Dosage Common side effects Staying on track
SUPPORT & EVENTS Support program Financial & insurance information Find events What is relapsing MS? Resources for care partners
PERSONAL STORIES Living with relapsing MS Viviendo con EM recurrente
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