Laura S., living with relapsing MS TECFIDERA is a twice-daily pill proven to work against relapsing multiple sclerosis (MS) in 3 important ways. TECFIDERA can: Slow DEVELOPMENT OF BRAIN LESIONS O O Delay PROGRESSION OF PHYSICAL DISABILITY O O Cut RELAPSES IN HALF O What is TECFIDERA? Tecfidera® (dimethyl fumarate) is a prescription medicine used to treat people with relapsing forms of multiple sclerosis. Important Safety Information 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. • 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. In a 2-year study, TECFIDERA reduced risk of relapse by 49% compared with placebo. People were also 38% less likely to experience physical disability progression. Say yes to TECFIDERA—a pill that can cut MS relapses in half.