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Objective: The current study was designed to evaluate the protective effect of standardized hydroalcoholic extract of Plumeria rubra (HAEPR) against cisplatin-induced nephrotoxicity in Wistar rats.  Methods: HAEPR was administered orally at 3 dose levels (100,200,400 mg/kg). Vitamin E (250 mg/kg) was used as a Standard nephroprotective agent. The kidney function test (estimation of serum creatinine, albumin, blood urea nitrogen) oxidative stress study (estimation of superoxide dismutase, malondialdehyde activity) and histological examination of kidneys was conducted. Results: The efficacy of HAEPR was compared with Cisplatin (CP) treated group. Serum creatinine and BUN was significantly (p<0.01) elevated in CP-treated group compared to the control group. HAEPR (100,200 mg/kg) and Vitamin E (250 mg/kg) significantly (p<0.01) decreased the serum creatinine and BUN levels. CP treated group exhibited significant (p<0.01) decrease in albumin when compared to control. Significant (p<0.01) increase in the serum albumin level was found in HAEPR (100,200 mg/kg) and Vitamin E (250 mg/kg) compared to CP group. Significant (p<0.01) decrease in the activity of SOD was observed in the CP group as compared to control. HAEPR (100 and 200 mg/kg) and Vitamin E (250 mg/kg) significantly (p<0.01) increased SOD levels. HAEPR (400 mg/kg) significantly (p<0.05) increased SOD levels. HAEPR (100,200,400 mg/kg) significantly (p<0.01) decreased MDA levels as compared to CP group. Histopathological examination of the kidneys showed that HAEPR markedly ameliorated Cisplatin-induced renal tubular necrosis. An extract was found effective at all doses, although low dose (100 mg/kg) was found to be more effective and comparable with the standard group (Vitamin E 250 mg/kg).  Conclusion: Present investigation revealed that HAEPR resulted in attenuation of Cisplatin-induced renal damage in rats.

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