[Pharmacological studies on extracts from Piper boehmeriaefolium var. tonkinense].

OBJECTIVE: To study sedative, analgesic, antidepressant and anti-inflammatory effects of the extracts from Piper boehmeriaefolium var. tonkinense.
METHOD: EtOAc soluble constituents and EtOH soluble constituents were administered 50, 100 mg x kg(-1) to mice respectively. The sedative effects were determined by autonomic action test. The analgesic effects were observed by the twisting test induced by acetic acid. The antidepressant effects were investigated by the forced swimming test. The anti-inflammatory effects were studied by auricle swelling induced by xylene. RESULT: EtOAc extracts could significantly lower autonomic action times, reduce squirming induced by acetic acid accumulated immobility time in forced swimming and auricle swelling values by xylene. But EtOH extracts could only decrease autonomic action times and accumulated immobility time.
CONCLUSION: The active ingredients with sedation, analgesia, antidepressant and anti-inflammation in P. boehmeriaefolium var. tonkinense exist mainly in the EtOAc extracts.