Canasa Coupon - Canasa 1000mg suppository
MESALAMINE is used to treat the pain and inflammation caused by ulcerative colitis. Compare aminosalicylates.
Canasa Coupon - Canasa 1000mg suppository

Canasa Side Effects

What should I watch for?

Tell your doctor or health care professional if your symptoms do not start to get better after several days. There is usually an improvement in 3 to 21 days. You may need about 6 weeks of treatment to get good results.

This medicine can cause stains on things it touches. Therefore keep it away from clothing and other fabrics, flooring, painted surfaces, marble, granite, plastics, and enamel. Be careful to avoid stains.


Interactions with Medications

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

Less common or rare

Abdominal or stomach cramps or pain (severe)


back pain (severe)

bloody, black, or tarry stools

blue or pale skin

bright red blood in the stool

chest pain, possibly moving to the left arm, neck, or shoulder


diarrhea (severe)

fast heartbeat


headache (severe)

nausea or vomiting

skin rash

stomach cramps, tenderness, or pain

swelling of the stomach

unusual tiredness or weakness

watery or bloody diarrhea

yellow eyes or skin

Incidence not known

Blood in the urine

change in the frequency of urination or amount of urine


dark-colored urine

difficulty with breathing


general feeling of tiredness or weakness

high fever

increased thirst

light-colored stools

loss of appetite

lower back or side pain

painful or difficult urination

pale skin

sore throat

sores, ulcers, or white spots on the lips or in the mouth

stomach pain, continuing

swelling of the feet or lower legs

swollen glands

troubled breathing

unexplained or unusual bleeding or bruising


Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

Abdominal or stomach cramps or pain (mild)

bloated or full feeling

excess air or gas in the stomach or intestines

gas or flatulence

headache (mild)

passing gas

Less common




leg or joint pain

loss of hair

rectal pain or irritation

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

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