Effect of extracts of Orthosiphon stamineus Benth, Hieracium pilosella L., Sambucus nigra L. and Arctostaphylos uva-ursi (L.) Spreng. in rats.

Aqueous extracts of Sambucus nigra and Arctostaphylos uva-ursi and hydroalcohol extracts of Orthosiphon stamineus and Hieracium pilosella were tested for their diuretic activities in rats; pharmacological evaluation revealed that they led to an increase in urine flow. Urinary sodium excretion in rats was increased with O. stamineus and S.