Asacol

Asacol affects a substance in the body that causes inflammation, tissue damage, and diarrhea. Mesalamine is used to treat ulcerative colitis, proctitis, and proctosigmoiditis. It is also used to prevent the symptoms of ulcerative colitis from recurring.

Asacol (mesalamine) is an anti-inflammatory drug used to treat ulcerative colitis, proctitis, and proctosigmoiditis, and is also used to prevent the symptoms of ulcerative colitis from recurring. Common side effects of Asacol include:

mild nausea,
vomiting,
stomach cramps,
diarrhea,
gas,
fever,
sore throat,
flu-like symptoms,
constipation,
headache,
dizziness,
tired feeling, or
skin rash.
Tell your doctor if you have serious side effects of Asacol including:

severe stomach pain,
cramping,
fever,
headache, and
bloody diarrhea.