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You are here : 3-RX.com > Drugs & Medications > Detailed Drug Information (USP DI) > Sulfonamides and Phenazopyridine

Sulfonamides and Phenazopyridine (Systemic)

Description and Brand Names | Before Using | Proper Use | Precautions | Side Effects

  • Antibacterial-analgesic, urinary tract - Sulfamethoxazole and Phenazopyridine; Sulfisoxazole and Phenazopyridine

Sulfonamides and phenazopyridine, combination products containing a sulfa medicine and a urinary pain reliever, are used to treat infections of the urinary tract and to help relieve the pain, burning, and irritation of these infections.

Sulfonamides and phenazopyridine combinations are available only with your doctor's prescription, in the following dosage forms:

  • Sulfamethoxazole and Phenazopyridine
    • Tablets (U.S.)
  • Sulfisoxazole and Phenazopyridine
    • Tablets (U.S. and Canada)

Brand Names

Some commonly used brand names are:

In the U.S. -

  • Azo Gantanol 1
  • Azo Gantrisin 2
  • Azo-Sulfamethoxazole 1
  • Azo-Sulfisoxazole 2
  • Azo-Truxazole 2
  • Sul-Azo 2

In Canada -

  • Azo Gantrisin 2


For quick reference, the following sulfonamides and phenazopyridine combinations are numbered to match the corresponding brand names.

This information applies to the following medicines:
1. Sulfamethoxazole and Phenazopyridine (sul-fa-meth-OX-a-zole and fen-az-oh-PEER-i-deen)†‡
2. Sulfisoxazole and Phenazopyridine (sul-fi-SOX-a-zole and fen-az-oh-PEER-i-deen)‡
† Not commercially available in Canada
‡ Generic name product may be available in the U.S.


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Sulfonamides and Phenazopyridine: Before Using

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