Nature’s Way Uva Ursi Leaves Description: Dietary Supplement Uva Ursi (Arctostaphylos uva-ursi) was first used by Welsh physicians on the 13th century. Its leaves were officially a drug for urinary antiseptic in the United States Pharmacopoeia and the National Formulary from 1820 until 1950. Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.