Analgesic and anti-inflammatory effects of ethanol extracted leaves of selected medicinal plants in animal model

Aim: The research was carried out to investigate the analgesic and anti-inflammatory effects of ethanol extract of Desmodium pauciflorum, Mangifera indica and Andrographis paniculata leaves. Materials and Methods: In order to assess the analgesic and anti-inflammatory effects acetic acid induced writhing response model and carrageenan induced paw edema model were used in Swiss albino mice and Wistar albino rats, respectively. In both cases, leaves extract were administered (2gm/kg body weight) and the obtained effects were compared with commercially available analgesic and anti-inflammatory drug Dclofenac sodium ( 40mg/kg body weight). Distilled water ( 2ml/kg body weight) was used as a control for the study. Results: In analgesic bioassay, oral administration of the ethanol extract of leaves were significantly ( p<0.01) reduced the writhing response. The efficacy of leaves extract were almost 35% in Desmodium pauciflorum, 56% in Mangifera indica and 34% in Andrographis paniculata which is found comparable to the effect of standard analgesic drug diclofenac sodium ( 76%). Leaves extract reduced paw edema in variable percentages but they did not show any significant difference among the leaves. Conclusion: We recommend further research on these plant leaves for possible isolation and characterization of the various active chemical substances which has the toxic and medicinal values.