If any of these side effects occur, contact a doctor immediately:

• Signs of Acute Intolerance Syndrome include: severe stomach pain, cramping, fever, headache, rash, or bloody and excessive stools (diarrhea)
• Development of bruising without an injury, fever, unusual fever, anemia, rash, or sore throat
• Serious skin rash that may be accompanied by flu-like symptoms or a fever
• Signs of an allergic reaction – swelling around the eyes, tongue or lips
• Increased pressure in the brain that may cause headaches, blurred or dimmed vision, seeing light flashes, permanent or brief vision loss

The most common side effects may include:

• Nausea
• Headache
• Indigestion
• Diarrhea
• Vomiting
• Itchiness of skin or rash
• Muscle and joint pain
• Back pain
• Change in blood pressure
• Flatulence 
• Bloating or pain in the stomach
• Weakness or fatigue
• Fever 
• Abnormal liver function tests

Not all side effects are listed above. For further information, refer to the manufacturer’s product insert that comes with this medication. 

Consult a doctor or healthcare provider before taking this or any other medication.

Mezavant is indicated for the use of adults over the age of 18 years who suffer from ulcerative colitis. 

Mezavant is an anti-inflammatory treatment that contains an active ingredient called mesalamine. Mesalamine, an anti-inflammatory agent, is used to help treat ulcerative colitis and prevent the recurrence of this condition.