The present study was undertaken to investigate diuretic effect of root of Linaria ramosissima (Wall.), Scrophulariaceae, a folklore plant, in albino rats. Suspension of root powder in 2% gum acacia was administered to experimental rats orally at doses of 450mg/kg. The diuretic effect was evaluated by measuring urine volume, pH of urine and urinary electrolyte excretion. Administration of test drug increased the urine volume significantly, Moreover it also enhanced the urinary excretion of sodium, chloride and potassium significantly, in comparison to control group. From the present study, it can be concluded that, the roots of Linaria ramosissima (Wall.) have significant diuretic activity.
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