Side Effects & Precautions
Uva ursi is considered safe for most people when used appropriately for a short period of time. Reported side effects, which are generally mild, include irritability, stomach discomfort, nausea, vomiting, insomnia and a greenish-brown discoloration of the urine.
Large doses and/or long-term use can cause serious liver problems, eye problems, breathing problems, convulsions and death. Uva ursi should not be taken for more than one week at a time and should not be repeated more than five times in one year.
Children, women who are pregnant or breastfeeding, and people with high blood pressure, digestive problems, Crohn's disease, ulcers, kidney disease, liver disease or retinal thinning should not take uva ursi.
If taking medications, especially corticosteroids, nonsteroidal anti-inflammatory drugs (NSAIDs) and lithium, consult with your health care provider before taking.