[Acute renal failure caused by plant extract].

The authors review the case of a 30 years old female patient presenting with a 48 hours-standing anuria, who permanently used products of grist of a virtuous plant, Guarana and occasionally used a parenteral non-steroid painkiller. The clinical history and laboratory results showed acute renal and hepatic failure. The histological picture of the renal biopsy specimen verified an acute tubular necrosis. After temporary dialysis treatment, her renal function recovered progressively with compensatory polyuria. The authors would like to draw the attention to the risks of the use of over-the-counter marketed paramedicinal products, per se or in combination with pharmaceutically registered products, sold in pharmacies and nutrition supplement stores.