Melting Point:  214~215℃
Soubility:  Soluble in Chloroform,Methanol,Ethanol,and slightly in water.
Appearance:  White or milk white powder, oderless.
Pharmacology Action: Huperzine A may have cognition-enhancing activity, can maintains acetylcholine levels for healthy cognitive function and promotes enhanced memory and cell to cell communication,it is potentially ward off the devastating effect of the memory-robbing disease Alzheimer's.
Dosage:Huperzine A is a highly potent compound with a recommended dose of only 100 to 200 micrograms twice a day for age-related memory loss. We recommend using it only under a doctor's supervision.
Safety Issues:Perhaps because it works so specifically, huperzine A appears to have few side effects. However, children, pregnant or nursing women, or those with high blood pressure or severe liver or kidney disease should not take huperzine A except on a doctor's recommendation. We also don't know for sure whether huperzine A interacts adversely with any drugs; however, it seems likely that huperzine might interact with drugs that function in a similar fashion (such as standard drugs for Alzheimer's Disease).

 熔點：214~215 ℃ 
溶解性：易溶于氯仿，溶于甲醇、乙醇，微溶于水
性狀：白色或奶白色粉末，無味。
藥理作用：本品系由石杉科植物千層塔[Huperzinaserrata(Thumb.)Trev]中提取的一種生物堿，是一強效的膽堿酯酶可逆性抑制劑，其作用特點與新斯的明相似，但作用維持時間比后者為長。動物實驗表明，本品對真性膽堿酯酶具有選擇性的抑制，抑制強度是假性膽堿酯酶的數(shù)千倍；抑制方式為競爭性和非競爭性的混合型抑制，與單純競爭性抑制劑有顯著不同；易通過血腦屏障進入中樞，兼具有中樞及外周治療作用；有效時間長；從胃腸道吸收良好；安全指數(shù)大；穩(wěn)定性好。是一種強效的可逆性AChE抑制劑，能改善老年性記憶功能減退，可顯著提高AD患者的記憶、認知和行為功能，無明顯不良反應，是治療阿耳茨海默病的一個有前景的藥物。
適應癥：本品適用于良性記憶障礙、腦血管疾病、腦創(chuàng)傷、器質(zhì)性精神障礙、外周血管阻塞性疾病、糖尿病神經(jīng)病變、急慢性跟腱疼痛、運動性肌肉創(chuàng)傷。
不良反應：少數(shù)病人給藥后見耳鳴、頭暈、肌束顫動、出汗腹痛等，個別病人有瞳孔縮小、嘔吐、大便增加、視力模糊、心率改變、流涎、思睡等不良反應，上述副反應的出現(xiàn)率，除惡心外均較新斯的明為低，且均可自行消失。嚴重者可用阿托品對抗。
注意事項：①禁用于心絞痛、支氣管哮喘、機械性腸梗阻病人。②慎用于妊娠婦女。