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On-line version ISSN 1678-8060
Mem. Inst. Oswaldo Cruz vol.86 suppl.2 Rio de Janeiro 1991
Evaluation of acute administration of natural products with potential diuretic effects, in humans
Escola Paulista de Medicina, Disciplina de Nefrologia, São Paulo, Brasil
In order to evaluate the potential diuretic effect of two natural products, Elephantopus scaber and Alpinia speciosa, a trial administration was carried out in ten healthy volunteers and the effects compared to the those of a placebo. The substances were given on different days, with a seven day interval between doses. The amount of substance administered to the subjects was five times the usual dose i.e. 7.5 g/100 ml and 0.8 g/100 ml respectively. The following parameters parameteres were measured: urinary and plasma sodium, potassium, uric acid, calcium, phosphate, urea, creatinine. The subjects were also examined clinically and total urinary volume was assessed. The only significant finding (p < 0.05) was a slight diuresis with Alpinia speciosa, which also lowered the diastolic (p < 0.05) and systolic (p < 0.01) blood pressures. No effect on electrolytes or renal function parameters was observed, and this probably excludes any renal tubular or glomerular effect from these substances.
Key words: Natural products; diuretics; Elephantopus scaber; Alpinia speciosa