241EVALUATION OF IN-VITRO ANTIOXIDANT ACTIVITY OF SPATHODEA CAMPANULATA LEAVESRecently, natural plants have received much attention as sources of biological active substances including antioxidants. In the present study we investigated In-vitro antioxidant activity of hexane, ethyl acetate and ethanol extracts of Spathodea campanulata. In-vitro antioxidant activity was evaluated for extracts by using free radicals, Superoxide (Riboflavin photo reduction method) and DPPH. The selected plant extracts produced concentration dependent percentage inhibition of different free radicals and produced maximum activity at a concentration of 800µg and there after the percentage inhibition was raised gradually to its maximum level with higher concentrations. In the present study we found that the extracts of Spathodea campanulata showed good antioxidant activity. Among the three extracts, ethanol extract showed better activity than the other extracts on the tested super oxide free radical, ethyl acetate extract showed better activity than the other extracts on the tested DPPH free radicalraviau34@gmail.comResearch452013Spathodea campanulata,leaves,Free radicals,In-vitro Antioxidant activityRavi Kumar J,Ganga Rao BA.U College of Pharmaceutical Sciences, Andhra University, Visakhapatnam, A.P, India-530003.,A.U College of Pharmaceutical Sciences, Andhra University, Visakhapatnam, A.P, India-530003.