What are the side effects of aminosalicylic acid?

Common side effects of aminosalicylic acid include diarrhea, upset stomach, nausea and vomiting. Other more severe side effects are rare. However, there is a risk of liver damage while using aminosalicylic acid. If one or more of the following side effects develop, stop taking aminosalicylic acid and talk to your doctor right away. Severe side effects include: rash and fever, darkening of urine, abdominal pain and jaundice. Seek immediate medical care if you have any signs of an allergic reaction, including:

  • rash
  • difficulty breathing
  • itching
  • severe dizziness
  • trouble swallowing
  • swelling of the face, mouth or throat

To prevent allergic reaction to aminosalicylic acid, tell your doctor about any allergies you have to medications, dyes, foods or other substances. It's not known whether it is safe to use aminosalicylic acid while pregnant or breastfeeding; talk with your doctor about all possible risks and benefits before starting the medication.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.