Dimethyl fumarate is used to treat relapsing multiple sclerosis (MS). Dimethyl fumarate belongs to a group of medicines called disease-modifying therapies which help to slow or reduce the worsening of disability in people with relapsing remitting MS.
MS is caused by your immune system mistakenly attacking the myelin sheath in your brain and spinal cord, causing inflammation of the brain. Dimethyl fumarate decreases the inflammation in your brain and reduces nerve damage. Read more about multiple sclerosis.