The antioxidant activity of extracts of Oroxylum indicum stem bark was
evaluated using different methods. The ethyl acetate extract (EAE) showed
the lowest IC50 value (0.76 mg/ml) with the highest inhibition of DPPH. In the
FRAP assay, the hexane extract (HE) showed the highest ferric reducing ability
whereas the EAE showed better antioxidant ability with lowest IC50 value
(0.80mg/ml) in βCL assay. The EAE and HE showed highest ascorbic acid
equivalent (6.60 ± 0.22) and trolox equivalent (2.04 ± 0.07) values in antioxidative
capacity of ACW and ACL in PCL assay. During antimicrobial evaluation
HE, Chloroform extract (CE) and EAE were found effective against the
tested bacteria while the water extract (WE) showed better activity (14.25 ±
0.478) against yeast.