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Generic name: phenazopyridinefen-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: Miscellaneous genitourinary tract agents

Medically reviewed by on Aug 8, 2023. Written by Cerner Multum.

What is Re-Azo?

Re-Azo is a pain reliever that affects the lower part of your urinary tract (bladder and urethra).

Re-Azo is used to treat urinary symptoms such as pain or burning, increased urination, and increased urge to urinate. These symptoms can be caused by infection, injury, surgery, catheter, or other conditions that irritate the bladder.

Re-Azo will treat urinary symptoms, but this medication will not treat a urinary tract infection.. Take any antibiotic that your doctor prescribes to treat an infection.

Re-Azo may also be used for purposes not listed in this medication guide.

Re-Azo side effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Re-Azo may cause serious side effects. Stop using Re-Azo and call your doctor at once if you have:

  • little or no urinating;

  • swelling, rapid weight gain;

  • confusion, loss of appetite, pain in your side or lower back;

  • fever, pale or yellowed skin, stomach pain, nausea and vomiting; or

  • blue or purple appearance of your skin.

Common side effects of Re-Azo may include:

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.


You should not use Re-Azo if you have kidney disease.

Before taking this medicine

You should not use Re-Azo if you are allergic to it, or if you have kidney disease.

To make sure Re-Azo is safe for you, tell your doctor if you have:

FDA pregnancy category B. Re-Azo is not expected to harm an unborn baby. Do not use Re-Azo without a doctor's advice if you are pregnant.

It is not known whether phenazopyridine passes into breast milk or if it could harm a nursing baby. Do not use this medicine without a doctor's advice if you are breast-feeding a baby.

How should I take Re-Azo?

Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.

Take Re-Azo after meals.

Drink plenty of liquids while you are taking Re-Azo.

Re-Azo will most likely darken the color of your urine to an orange or red color. This is a normal effect and is not harmful. Darkened urine may also cause stains to your underwear that may be permanent.

Re-Azo can also permanently stain soft contact lenses, and you should not wear them while taking this medicine.

Do not use Re-Azo for longer than 2 days unless your doctor has told you to.

This medication can cause unusual results with urine tests. Tell any doctor who treats you that you are using Re-Azo.

Store at room temperature away from moisture and heat.

What happens if I miss a dose?

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while taking Re-Azo?

Do not use this medication while wearing soft contact lenses. Re-Azo can permanently discolor soft contact lenses.

What other drugs will affect Re-Azo?

Other drugs may interact with phenazopyridine, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell each of your health care providers about all medicines you use now and any medicine you start or stop using.

Frequently asked questions

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.