Objective:To evaluate the hepatoprotective and antioxidant properties of alkaloid extract of Cyclea peltata(C.peltata) against paracetamol/carbon tetra chloride induced liver damage in Wistar rats.Methods:In viro paracetamol/carbon tetrachloride induced liver damage in Wistar rats,in vitro free radical scavenging studies,HPTLC estimation of letrandrine and direct analysis in real timemass spectrometry of alkaloid extract of C.peltata were used for the validation.Results:The results showed that pretreatment with alkaloid extract of C.peltata caused significant reduction of serum glutamate pyruvate transaminase,serum glutamate oxaloacetate transaminase,serum alkaline phosphatase,serum cholesterol,liver malondialdehyde levels.The reduced glutathione,catalase,superoxide dismutase levels in liver were increased with alkaloid extract of C.peltata treatment.These results were almost comparable to silymarin and normal control.Histopathological studies also substantiated the biochemical findings.The in vitro hydroxyl,superoxide and DPPH scavenging study of alkaloid extract of C. peltata showed significant free radical scavenging property.Conclusions:The hepatoprotective property of alkaloid extract of C.peltata against paracetamol/carbon tetrachloride may be due the synergistic action of alkaloids especially tetrandrine,fangchinoline through free radical scavenging and thus preventing oxidative stress. Objective: To evaluate the hepatoprotective and antioxidant properties of alkaloid extract of Cyclea peltata (C.peltata) against paracetamol / carbon tetrachloride induced liver damage in Wistar rats. Methods: In viro paracetamol / carbon tetrachloride induced liver damage in Wistar rats, in vitro free radical scavenging studies, HPTLC estimation of letrandrine and direct analysis in real timemass spectrometry of alkaloid extract of C.peltata were used for the validation. Results: The results showed that pretreatment with alkaloid extract of C.peltata caused significant reduction of serum glutamate pyruvate transaminase, serum glutamate oxaloacetate transaminase, serum alkaline phosphatase, serum cholesterol, liver malondialdehyde levels. reduced glutathione, catalase, superoxide dismutase levels in liver were increased with alkaloid extract of C.peltata treatment.These results were almost comparable to silymarin and normal control Histopathological studies also substantiated the biochemical finding s.The in vitro hydroxyl, superoxide and DPPH scavenging study of alkaloid extract of C. peltata showed significant free radical scavenging property. Conclusions: The hepatoprotective property of alkaloid extract of C. peltata against paracetamol / carbon tetrachloride may be due to the synergistic action of alkaloids especially tetrandrine, fangchinoline through free radical scavenging and thus prevented oxidative stress.