AZO Urinary Tract Defense Tablets, 24 ct.The formula in AZO Urinary Tract Defense Combines:Methenamine, a powerful anti-bacterial medicine that works by slowing down the growth of the bacteria along the urinary tract and helping to control your UTI. Sodium Salicylate, a NSAID that provides general pain relief.Take AZO Urinary Tract Defense at the first signburning, urgency you know the drillof a UTI to help slow the progression of the infection. From the #1 Most Trusted Brand in urinary health.