Huperzine-A is an acetylcholinesterase inhibitor similar to other compounds donepezil, rivastigmine, and galantamine. In the US, Huperzine-A is sold as a dietary supplement for memory support. The botanical has been used in China for centuries for the treatment of swelling, fever and blood disorders. Clinical trials in China have shown it is effective in the treatment of Alzheimer's disease, and has been shown to enhance memory in healthy young students in one study. Huperzine-A is a promising drug for symptomatic treatment of Alzheimer's disease.