Huperzine A uses

Traditional/Ethnobotanical uses
The use of club moss can be used for the treatment of rheumatism and colds, to relax muscles and tendons, and to improve blood circulation. The club moss H. serrata has been used in Chinese folk medicine under the name Qian Ceng Ta (Chien Tseng Ta) for the treatment of bruises, strains, swelling, and, more recently, organophosphate poisoning, myasthenia gravis, and schizophrenia.

Alzheimer disease
A Cochrane review of the effect of huperzine A in Alzheimer disease, as well as other reviews, note the lack of quality long-term clinical trials to support definitive statements about a place in therapy for huperzine A, despite numerous clinical studies being undertaken.

Other uses
Historically, club moss has been used for the treatment of bruises, strains, swelling, rheumatism, and colds, to relax muscles and tendons, and to improve blood circulation. Because of its anticholinesterase activity, huperzine A, a constituent of the whole plant, has been studied for potential use in treating Alzheimer disease and other CNS disorders; however, there is still insufficient evidence to support its routine use.