From Web MD:
Panax ginseng is a plant that grows in Korea, northeastern China, and far eastern Siberia. People use the root to make medicine. Do not confuse Panax ginseng with American ginseng, Siberian ginseng, or Panax pseudoginseng. See the separate listings for American Ginseng, Ashwaganda, Blue Cohosh, Canaigre, Codonopsis, Panax Pseudoginseng, and Siberian Ginseng.
Panax ginseng is taken by mouth to improve thinking, concentration, memory, Alzheimer’s disease, work efficiency, physical stamina, preventing muscle damage from exercise, and athletic endurance.
Some people use Panax ginseng to help them cope with stress and as a general tonic for improving well-being. They sometimes call Panax ginseng an “adaptogen” when it’s used in this way.
Panax ginseng is also used for depression, anxiety, general fatigue and chronic fatigue syndrome (CFS), multiple sclerosis, for boosting the immune system, and for fighting particular infections in a lung disease called cystic fibrosis. These infections are caused by a bacterium named Pseudomonas.
Other uses include treatment of anemia, chronic bronchitis, swine flu, prediabetes and diabetes, inflammation of the stomach lining (gastritis), fever, hangover, chronic obstructive pulmonary disease (COPD), HIV/AIDS, fertility problems and sexual dysfunction in men, to increase sexual arousal in women, and asthma.
Panax ginseng is also used for bleeding disorders, loss of appetite, vomiting, intestinal problems, gallstones, bad breath, fibromyalgia, sleeping problems (insomnia), nerve pain, joint pain, dizziness, headache, hearing loss, convulsions, disorders of pregnancyand childbirth, hot flashes due to menopause, common cold and flu, heart failure, high blood pressure, quality of life, wrinkled skin, and to slow the aging process.
Some men apply Panax ginseng to the skin of the penis as part of a multi-ingredient product for treating early orgasm (premature ejaculation).
In manufacturing, Panax ginseng is used to make soaps, cosmetics, and as a flavoring in beverages.
How does it work?
Panax ginseng contains many active substances. The substances thought to be most important are called ginsenosides or panaxosides. Ginsenosides is the term coined by Asian researchers, and the term panaxosides was chosen by early Russian researchers.
Panax ginseng is often referred to as a general well-being medication, because it affects many different systems of the body.