Fatigue is a major cause of disability in MS and is associated with a reduced quality of life. Treatment options for MS fatigue include central nervous system stimulants and amantadine. These medications are of limited efficacy, are often poorly tolerated, and can be expensive. Ginseng may represent a novel approach to treating MS fatigue. Ginseng has been tested in clinical trials for its ability to improve mental alertness and fatigue. However, there have been no published clinical trials addressing the effects of ginseng in subjects with MS, even though many people with MS use ginseng and report deriving benefit from it.