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Generic name: phenazopyridine [fen-AY-zoe-PIR-i-deen]

Brand names: AZO Urinary Pain Relief, AZO Urinary Pain Relief Max Strength, Azo-Standard, Baridium, Prodium,… Show all 12 brands
Drug class: Other agents of the genitourinary system

What is Re-Azo?

Re-Azo relieves pain in the lower urinary tract.Re-Azo can be used to treat urinary symptoms like pain, burning, increased urination, and an increased urge to urinate. These symptoms may be caused by an infection or injury. Surgery can also cause these symptoms.Re-Azo treats urinary symptoms, but it will not treat an infection of the urinary tract. Use any antibacterial medication prescribed by your doctor to treat the infection.Re-Azo can be used in other ways not mentioned in this guide.

Side effects of Re-Azo

If you experience any of the following symptoms of an allergic reaction, seek immediate medical attention: hives, difficulty breathing, swelling of your lips, face, tongue, or throat.

Re-Azo may cause serious side effects. Re-Azo should be stopped immediately, and you should consult your doctor if:

  • Little or no urinating is acceptable.
  • Rapid weight gain and swelling
  • Pain in the side or lower back, confusion, and loss of appetite
  • Fever or stomach pain. Nausea or vomiting.
  • Blue or purple coloration of the skin

Re-Azo can cause the following side effects:

  • Headache;
  • Dizziness;
  • Upset stomach.

There may be other side effects. Call your doctor for medical advice about side effects. To report adverse effects, you can contact the FDA at 1-800-FDA-1088.


Re-Azo should not be used if you suffer from kidney disease.

Before you take this drug

Re-Azo should not be used if the user is allergic or has kidney disease.

Tell your doctor about any of the following to ensure that Re-Azo will be safe for you:

  • Liver disease
  • Diabetes
  • A genetic enzyme deficiency called glucose-6-phosphate dehydrogenase (g6pd) deficiency.

FDA pregnancy category B ReAzo should not harm an unborn child. If you are pregnant, do not use ReAzo without consulting your doctor.It is unknown if phenazopyridine can pass into breast milk or if it will harm a baby who is nursing. If you are breastfeeding a child, do not take this medication without consulting your doctor.

How to take ReAzo?

Do not exceed the recommended dosage or duration. Use the recommended dose and do not exceed it.After meals, take Re-Azo.Re-Azo should be taken with plenty of fluids.Re-Azo is likely to darken your urine's color, turning it orange or red. This is a harmless effect. The darkened urine can also stain your underwear permanently.Soft contact lenses can be permanently stained by Re-Azo. You should avoid wearing them when taking this medication.Re-Azo should not be used for more than 2 days unless you have been told by your doctor to do so.Re-Azo can produce unusual urine test results. Re-Azo can cause unusual results in urine tests. Tell your doctor if you use it.Store away from heat and moisture at room temperature.

What happens if I miss the dose?

As soon as you recall, take the missed dose. If your next scheduled dosage is approaching, skip the missed dose. You should not take more medicine to compensate for a missed dose.

What happens if I overdose?

Call 1-800-222-1222 for poison help or seek immediate medical attention.

What should be avoided?

Do not use Re-Azo while wearing soft lenses. It can permanently stain soft lenses.

Interaction with other drug

PHENAZOPYRIDINE may interact with other drugs, such as prescription and over-the-counter medicines, vitamins, and herbal products. Inform your healthcare providers of all the medicines you are taking and those you plan to take.