Urinary Pain Relief Max-Strength Tablets, 24 ct, QC99666 Sale! This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Compare to the Active Ingredient in AZO Maximum Strength. Fast relief from urinary pain, burning, urgency and frequency associated with urinary tract infections. Strongest UTI pain relief available without a prescription. Targets the source of pain.