Product Narrative, T. S. Fox, Ph.D. Uva Ursi is a diuretic, antimicrobial and has found wide anecdotal efficacy in controlling involuntary bladder voiding. Dosage is one cc per 50 lb. weight up to three times daily. Use eight cc three times daily for large herbivores. Large dosages may result in nausea, vomiting and collapse. Avoid use during pregnancy and lactation.