The best known phenazopyridine nonprescription product is Azo Standard. Azo Standard contains 95 mg of phenazopyridine per tablet and Azo Standard Maximum Strength contains 97.5 mg of phenazopyridine. The dosage of both is 2 tablets 3 times daily with or after meals as needed.
This medication is used to relieve symptoms caused by irritation of the urinary tract such as pain, burning, and the feeling of needing to urinate urgently or frequently. This drug does not treat the cause of the urinary irritation, but it can help relieve the symptoms while other treatments take effect. Phenazopyridine is a dye that works as a painkiller to soothe the lining of the urinary tract.