Note: This document contains side effect information about phenazopyridine. Some dosage forms listed on this page may not apply to the brand name Azo Urinary Pain Relief.

Applies to phenazopyridine: oral tablet.

Serious side effects

Along with its needed effects, phenazopyridine (the active ingredient contained in Azo Urinary Pain Relief) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor as soon as possible if any of the following side effects occur while taking phenazopyridine:

Rare

• Blue or blue-purple color of skin
• fever and confusion
• shortness of breath, tightness in chest, wheezing, or troubled breathing
• skin rash
• sudden decrease in the amount of urine
• swelling of face, fingers, feet, and/or lower legs
• unusual tiredness or weakness
• weight gain
• yellow eyes or skin

Other side effects

Some side effects of phenazopyridine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common or rare

• Dizziness
• headache
• indigestion
• itching of the skin
• stomach cramps or pain

For Healthcare Professionals

Applies to phenazopyridine: compounding powder, oral tablet.

Nervous system

Frequency not reported: Headache^[Ref]

Dermatologic

Frequency not reported: Rash, pruritus^[Ref]

Gastrointestinal

Frequency not reported: Upset stomach^[Ref]

Genitourinary

Frequency not reported: Orange to red discoloration of the urine^[Ref]

Hypersensitivity

Frequency not reported: Anaphylactic-like reaction^[Ref]

Ocular

Frequency not reported: Staining of contact lenses^[Ref]