Eleuthero (Eleutherococcus senticosus) is a woody shrub sometimes called Siberian ginseng. It is not a true ginseng. It is sometimes used as an adaptogen.

Eleuthero is often considered an adaptogen. Adaptogens are a class of substances that are believed to stimulate the body's resistance to physical, environmental, and emotional stressors. Eleuthero contains many chemicals that affect the brain, immune system, and certain hormones.

People use eleuthero for genital herpes, diabetes, athletic performance, memory and thinking skills, the common cold, and many other conditions, but there is no good scientific evidence to support most of these uses.