Balsalazide (Colazal) is an anti-inflammatory drug approved for treatment of mild to moderately active Ulcerative Colitis (UC).

How should it be used?

  • This medication should be swallowed whole, and not crushed or chewed.
  • Take with a full glass of water.
  • Take with or without food.
  • If you miss a dose, take it as soon as you remember unless it is almost time for your next regular dose. Do not take extra medicine to make up for the missed dose.

Special Precautions/Instructions

  • Tell your doctor about all of the medicines (including over the counter), vitamins, herbal products, and supplements you take before you start this medicine.
  • If you are allergic to this medicine or anything in this medicine including:
    • Salycylates or aspirin type products
    • balzalazide disodium,
    • colloidal silicon dioxide,
    • magnesium stearate
  • Have a narrowing of the outlet from the stomach (pyloric stenosis)
  • Have renal dysfunction or renal disease.
  • Are pregnant, intend to become pregnant or are breastfeeding.

Side Effects

The most common side effects include: fever, diarrhea, headache, nausea, abdominal pain, vomiting, respiratory infection, and joint pain.

Contact your doctor immediately if you experience signs of an allergic reaction including:

  • Diarrhea
  • Feeling sick
  • Fever, shivering/chills, rash
  • Muscle and bone pain
  • Kidney problems (changes in the amount of urine or color of urine)
  • Tiredness, dizziness
  • Itching
  • Swelling
  • Trouble breathing

Storage Conditions

This medication should be stored at room temperature.


Call the national poison control center 1-800-222-1222 or 911 in the event of overdose. Symptoms of an overdose include vomiting, diarrhea, sore throat, fever, chills, and other signs of infection.

Pediatric Use

The safety and efficacy of this drug in pediatric patients younger than 5 years of age have not yet been established.

Colazal Ingredients

-balzalazide disodium, colloidal silicon dioxide, magnesium stearate

Additional Information

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