Fingolimod is primarily used in the treatment of multiple sclerosis (MS), a chronic autoimmune disease that affects the central nervous system. It works by modulating the immune system to reduce inflammation and prevent the immune cells from attacking the nerve fibers. This helps in decreasing the frequency of relapses and delaying the progression of physical disability in patients with relapsing forms of MS. Fingolimod is taken orally, making it a convenient option for long-term management of the disease. It is particularly effective for patients who have not responded well to other MS therapies or who require a more manageable treatment regimen. Regular monitoring is essential while on this medication to manage potential side effects, such as increased risk of infections and cardiovascular issues.