Antinociceptive activity of chronic administration of different extracts of Terminalia bellerica Roxb. and Terminalia chebula Retz. fruits.
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The petroleum ether (PE), chloroform (CH), ethanol (ETH) and water extracts of Terminalia bellerica and T. chebula fruits were evaluated for their analgesic activity using the tail immersion model in mice. The ethanolic extracts of both the plants exhibited analgesic response at 200,400 and 800mg/kg. The studies were further carried for 15 days to evaluate the effect of these extracts in chronic pain and maximum analgesic response was observed on 14th day in both the plants. Phytochemical investigation of ethanolic extract of the fruits of Terminalia bellerica and T. chebula revealed the presence of saponins, triterpenoids, carbohydrates, tannins and proteins. The results indicate that fruits of T. bellerica and T. chebula could be considered as potential candidate for bioactivity-guided isolation of natural analgesic agents used in the management of chronic pain.