phenazopyridine (Uristat, UTI Relief, and others) (cont.)

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Medical and Pharmacy Editor:

PRESCRIPTION: Yes, and in OTC preparations



  • OTC Oral tablets: 95 mg and 97.5 mg
  • Prescription oral tablets: 100 mg, 200 mg

STORAGE: Tablets should be stored at room temperature between 15 C and 30 C (59 F to 86 F). Keep phenazopyridine and all medications away from pets and children.

PRESCRIBED FOR: Phenazopyridine is used to provide relief of symptoms associated with lower urinary tract infections including urinary burning, pain, urgency, and frequency among others.

DOSING: The usual recommended adult dose of phenazopyridine is 100 to 200 mg three times daily after meals. Treatment should not exceed 2 days when used in-combination with an antibacterial agent. The maximum daily dose for adults is 600 mg.

Dose adjustment may be required for patients who have kidney disease. Phenazopyridine should not be used in patients whose creatinine clearance is less than 50 ml/min. Phenazopyridine should be administered every 8-16 hours in patients whose creatinine clearance is between 50-80 ml/min.

The usual recommended dose for children and adolescents is 4 mg/kg orally three times daily after meals. The child's pediatric doctor should calculate the dose. Treatment should not exceed 2 days when used in-combination with an antibacterial agent.

DRUG INTERACTIONS: No clinical significant drug interactions have been reported with phenazopyridine use.

PREGNANCY: Phenazopyridine is classified as FDA pregnancy risk category B (animal studies show no harm to fetuses but there are no well-controlled studies in pregnant women). Reproduction studies in rats at doses up to 50 mg/kg//day have shown no evidence of fetal harm. However, as with all drugs, phenazopyridine should be used in pregnancy only if clearly needed.

NURSING MOTHERS: It is not known if phenazopyridine is excreted in breast milk.

SIDE EFFECTS: Common side effects of phenazopyridine treatment affecting up to 10 percent of patients are:

Medically Reviewed by a Doctor on 11/24/2014

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