Abstract: Pracetam, huperzine A, gynostemma pentaphyllum makino, helicid andanisodine are neural drugs prepared recently. Except piracetam, they arenew alkaloids and potent components isolated from traditional Chineseherbs by Chinese phytochemists. In this paper the effects of piracetam,huperzine A, gynostemma pentaphyllum makino, helicid and anisodine onopen field behavior in rats are reported. The results showed that piracetam, huperzine A, gynostemma penta-phyllum makino and helicid caused remakable inhibitory behavioral rea-ction in rats, however, anisodine caused the animals' excitatory behavio-?al reaction.

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