Cystex Urinary Pain Relief Tablets, 40 count. Cystex Urinary Pain Relief Tablets provide antibacterial protection plus pain relief by combining a key pain-fighting analgesic, sodium salicylate (162.5 mg/tablet), with an effective antibacterial agent, methenamine (162 mg/tablet), to help relieve the pain and burning associated with a UTI while also inhibiting the progression of the infection until you can see your doctor. Additionally, Cystex Urinary Pain Relief Tablets will not change the color of the urine as some other OTC medications will.