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Saffron is the most expensive spice in the world and consists of the dried stigmas of Crocus sativus L. It is used as food coloring and flavoring in food industry and traditional cooking and also in folk medicine as antispasmodic, carminative, stomachic, expectorant, aphrodisiac and cardiotonic. The present study has evaluated the diuretic activity of aqueous extract of dried saffron (stigma of Crocussativus) in rat. Aqueous extracts of saffron were administered to experimental rats orally as doses of 60, 120 and 240 mg/kg body weight (BW) and compared with hydrochlorothiazide (10 mg/kg B.W., intraperitoneally), a potent diuretic as positive control and normal saline solution as placebo for control group. The measured parameters for diuretic activity were total urine volume, urine electrolytes concentration such as sodium and potassium, creatinine and urea concentration. The treated rats with aqueous extract of saffron as doses of 120 and 240 mg/kg BW showed higher urine output when compared to the control group. Also, it has shown a significant dose-dependent increase in the excretion of electrolytes when compared to the control group. Our findings proved the diuretic activity of saffron which is used in traditional medicine, it can be an effective and safe strategy for related dysfunction. Also further studies are needed to identify the mechanisms of action, probably other effects and interactions with other medicines.

Study on diuretic activity of saffron (stigma of Crocus sativus L.) Aqueous extract in rat