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 RESEARCH ARTICLE
Year : 2012  |  Volume : 44  |  Issue : 4  |  Page : 493-499

Analgesic activity of the ethanolic extract of Shorea robusta resin in experimental animals


Division of Pharmacology and Toxicology, Indian Veterinary Research Institute, Izatnagar- 243 122, (U.P.), India

Correspondence Address:
Dinesh Kumar
Division of Pharmacology and Toxicology, Indian Veterinary Research Institute, Izatnagar- 243 122, (U.P.)
India
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Source of Support: Indian Veterinary Research Institute, Conflict of Interest: None


DOI: 10.4103/0253-7613.99322

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Aim: Shorea robusta (Sal), an important traditional Indian medicinal plant used in various ailments and rituals and the indigenous use of the resin of this plant as a medicament for treatment of various inflammatory conditions is well documented in literature. In the present study, ethanolic extract of S. robusta resin (SRE) was evaluated for its analgesic activity by making use of different central and peripheral pain models. Materials and Methods: The analgesic activity of SRE was assessed by employing different pain models such as, i) hot plate and tail flick tests for central analgesia, ii) acetic acid- induced writhing (peripheral analgesic model), iii) formalin-induced hind paw licking (both central and peripheral model), iv) carrageenan-induced hyperalgesia (peripheral analgesic model) and v) post-surgical pain (peripheral analgesic model). Results: The extract produced significant central and peripheral analgesic effects, as is evident from increase in reaction time in hot plate and tail flick tests, inhibition in writhing counts in acetic acid-induced writhing test, inhibition of licking time in formalin-induced hind paw licking, increased pain threshold in paw withdrawal latency in carrageenan-induced hyperalgesia and increased paw withdrawal threshold in post-surgical pain. Conclusion: The results of the present study demonstrate marked antinociceptive effects of SRE.






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