Siberian ginseng, also known as devil�s shrub, eleuthero, or touch-me-not, is not in fact a member of the ginseng family. They do however share some similar properties. It is a deciduous shrub and a powerful tonic. It stimulates resistance to stress, improves memory and restores vigour. It has also been used to combat radiation sickness and should in all cases not be used for more than 3 weeks at a time.