Asacol: Uses & Side Effects

Asacol (mesalamine) affects a substance in the body that causes inflammation, tissue damage, and diarrhea.

Asacol HD delayed-release 800mg tablets are used to treat moderately active ulcerative colitis in adults.


Before taking this medicine

You should not use Asacol HD if you are allergic to mesalamine, aspirin, sulfasalazine, or salicylates (such as Nuprin Backache Caplet, Kaopectate, KneeRelief, Pamprin Cramp Formula, Pepto-Bismol, Tricosal, Trilisate, and others).

To make sure Asacol HD is safe for you, tell your doctor if you have:

  • a stomach condition called pyloric stenosis;
  • heart disease;
  • kidney disease;
  • liver disease; or
  • a history of blockage in your digestive tract (stomach or intestines).

It is not known whether Asacol HD will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

Mesalamine can pass into breast milk and may harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

Do not give this medicine to a child without medical advice.


Side effects

Stop using Asacol HD and call your doctor at once if you have:

  • severe stomach pain, cramping, bloody diarrhea;
  • fever, headache, skin rash;
  • bloody or tarry stools, coughing up blood or vomit that looks like coffee grounds;
  • kidney problems – little or no urination, painful or difficult urination, swelling in your feet or ankles, feeling tired or short of breath; or
  • liver problems – loss of appetite, upper stomach pain, tiredness, easy bruising or bleeding, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Common Asacol HD side effects may include:

  • nausea, stomach pain, diarrhea, constipation;
  • runny or stuffy nose, sinus pain, sore throat;
  • flu-like symptoms;
  • headache, back pain;
  • rash; or
  • abnormal liver function tests.

Keyword: asacol; mesalamine.

* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.