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Title: Elucidation of possible mechanism of analgesic action of Valeriana wallichii DC chemotype (patchouli alcohol) in experimental animal models
Authors: Sah, Sangeeta Pilkhwal
Mathela, Chandra S
Chopra, Kanwaljit
Keywords: Analgesic;Essential oil;Iridoids;Valeriana wallichii
Issue Date: Mar-2010
Publisher: CSIR
Abstract: Valeriana wallichii (Family Valerianaceae), popularly named as Indian valerian, exists as three chemotypes. Aim of the study was to evaluate the effect of V. wallichii chemotype (patchouli alcohol) extract (DCME) and essential oil (VPAEO) on experimental models of nociception and to elucidate its possible mechanism of action. Analgesic effect was evaluated using acetic acid induced writhing and tail flick model. DCME and VPAEO (40 and 80 mg/kg, p.o.) significantly inhibited the number of writhings as compared to vehicle treated group. None of the doses of DCME and VPAEO exhibited any effect in tail flick model suggesting only peripheral analgesic activity. When studied for mechanism of action in acetic acid induced writhing, subeffective dose of essential oil significantly potentiated the effect of aspirin while no potentiation was seen in case of extract. These data suggest that essential oil VPAEO exerted peripheral analgesic via inhibition of prostaglandin synthesis.
Page(s): 289-293
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Appears in Collections:IJEB Vol.48(03) [March 2010]

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