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The ethanolic leaves extract of Populus deltoides was tested for the presence of various phytoconstituents and designed to evaluate the analgesic activity in mice. The peripheral analgesic activity of ethanolic leaves extract of P.deltoides (250 and 500 mg/kg) was studied by using acetic acid stimulated writhing test and central analgesic activity of P.deltoides was studied by using hotplate process. The ethanolic leaves extract of P.deltoides professed the existence of a variety of chemical constituents like alkaloids, saponins, flavonoids, terpenes and steroids. Leaves extract of P.deltoides appreciably decreased the writhing actions in acetic acid-induced writhing test in mice and amplified the respond time in hotplate test. These results suggest that the extract may have NSAIDs like activity through the peripheral mechanism and central analgesic activities via opioid receptors. From our study, we endowed that leaves extract of P.deltoides has feasible to analgesic activity. This study reveals that it can be used in the management of pain and provide a scientific basis for its traditional use.
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