The objective of the present study was to evaluate aqueous extract of Trimad for its in vitro antioxidant activity. A battery of in vitro biochemical tests such as total phenol content, ferric reducing power, ABTS [2, 2 azino-bis (3-ethylbenzothiazoline-6-sulphonic acid)] scavenging activity and Lipid peroxidation inhibitory activity was used. The total phenol content of Trimad was found to be 279.5 mg/g dry mass. In case of DPPH scavenging activity, Trimad was found to be more potent than ascorbic acid at all given concentrations. It also showed significant ferric reducing potential (0.110% at 20μg/ml) and ABTS scavenging activity (31% at 80μg/ml). Trimad however showed very minimal (4.754% at 100μg/ml) lipid peroxidation activity. Our findings indicate promising antioxidant activity of Trimad extract however it needs further attention for its effective use in both modern and traditional system of medicines