Uva Ursi (Arctostaphylos uva-ursi) has spread from Central Europe north to Scandinavia and east to Siberia. The plant can also be found in the Himalayas, Altai mountains, and North America. The leaves have a bitter and astringent taste. They can be used medicinally. Uva ursi can have urinary antiseptic and astringent effects. Its constituents include arbutin, tannin, and hydroquinone. Uva ursi has also been attributed diuretic, antimicrobial, and gastrointestinal effects. Uva ursi has been used for urinary tract infections and inflammation, constipation, cystitis, urethritis, diuresis, and acidic urine.
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Cautions Orally, uva ursi can cause nausea, vomiting, and gastrointestinal discomfort.