Treatment of EDS relies on identifying and treating the underlying disorder which may cure the person from the EDS. Drugs like modafinil,[4] Armodafinil,[5] Xyrem (sodium oxybate) oral solution, have been approved as treatment for EDS symptoms in the U.S. There is declining usage of other drugs such as methylphenidate (Ritalin), dextroamphetamine (Dexedrine), amphetamine (Adderall), lisdexamfetamine (Vyvanse), methamphetamine (Desoxyn), and pemoline (Cylert), as these psychostimulants may have several adverse effects[6] and may lead to dependency when illicitly misused.