300
Participants
Start Date
November 30, 2019
Primary Completion Date
December 31, 2024
Study Completion Date
December 31, 2025
Huperzine A
The participants will treatment by the Huperzine A 200 ug/day in 52 weeks.
Placebo
The participants will treatment by the placebo in 52 weeks.
Shanghai Mental Health Center, Shanghai
Shanghai Mental Health Center
OTHER