Abstract
This study was conducted to determine the analgesic activity of aqueous extract of Terminalia paniculata (Tp) bark. Analgesic activity was determined using hot plate and tail flick method. Thirty adult Wistar rats were divided into 5 groups of 6 rats each. Group I (control) received 2 mL water, Group II -codeine 5 mg kg-1, Group III, IV and V 100, 200 and 400 mg kg-1 of Tp, respectively. Latency time to pain sensation was noted. In hot plate model, group 5 showed significant increase in reaction time compared to groups 3 and 4 at all-time points and was comparable to standard codeine at 120th and 180th min. In tail flick method, standard codeine showed significant increased latency time compared to all three doses of Tp at 90th, 120th and 180th min. Group 5 showed significant increased reaction time compared to groups 3 and 4 from 60th min to 180th min. Group 4 showed increased analgesic activity compared to group 3 at 90th, 120th and 180th min but group 3 was significantly better at 30th min. Thus T. paniculata possesses analgesic potential.
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