AZO Urinary Pain Relief is a trusted brand of over-the-counter pain reliever that provides fast, effective relief from the symptoms of urinary tract infections (UTIs), including pain, burning, and urgency. It contains a powerful dose of the active ingredient phenazopyridine hydrochloride, which targets the source of pain in the urinary tract. AZO Urinary Pain Relief Maximum Strength starts working in as little as 20 minutes.