Used primarily in the treatment of relapsing forms of multiple sclerosis (MS), this compound helps reduce the frequency of clinical relapses and delays the progression of physical disability. It works by modulating the sphingosine-1-phosphate receptor, which leads to the sequestration of lymphocytes in lymph nodes, thereby reducing their migration into the central nervous system. This action decreases inflammation and autoimmune attacks on neural tissues. It is taken orally, offering a convenient option compared to injectable therapies. Also under investigation for potential use in other autoimmune conditions and neurodegenerative diseases due to its neuroprotective properties.