Currently, immunomodulatory drugs are considered as the first line treatment in MS. Fingolimod is the first oral immunomodulatory medication used for Relapsing-Remitting MS. It is phosphorylated by crossing the blood-brain barrier and is converted to its active metabolite, Fingolimod-P. This metabolite acts as a Sphingosine-1-phosphate receptor (S1PR1) on oligodendrocytes, microglias, astrocytes, and neurons and inhibits the entry of lymphocytes into the central nervous system. Therefore, it reduces demyelination and may also lead to remyelination.