Mesalamine Rectal Suppositories

What is this medication?

MESALAMINE (me SAL a meen) treats ulcerative colitis. It works by decreasing inflammation in the digestive tract. It belongs to a group of medications called salicylates.

This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.

COMMON BRAND NAME(S): Canasa

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What should I tell my care team before I take this medication?

They need to know if you have any of these conditions:

  • Kidney disease
  • Liver disease
  • An unusual or allergic reaction to mesalamine, aspirin, other medications, foods, dyes, or preservatives
  • Pregnant or trying to get pregnant
  • Breast-feeding

How should I use this medication?

This medication is for rectal use only. Do not take by mouth. Wash your hands before and after use. Take off the wrapping. Try to handle the suppository as little as you can, so that it does not melt before use. Do not cut or break suppository. A small amount of lubricating gel may be used on the tip of the suppository. Lie on your side with your lower leg straightened out and your upper leg bent forward toward your stomach. Lift upper buttock to expose the rectal area. Apply gentle pressure to insert the suppository completely into the rectum, pointed end first. Hold buttocks together for a few seconds. For best results, use this medication after you have had a bowel movement, and try to keep in place for 1 to 3 hours or longer. Do not use more often than directed.

Take your medication at regular intervals. Follow the directions on the prescription label. Do not stop taking except on your care team's advice.

Talk to your care team about the use of this medication in children. Special care may be needed.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

NOTE: This medicine is only for you. Do not share this medicine with others.

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What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What may interact with this medication?

Interactions are not expected.

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

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What should I watch for while using this medication?

Visit your care team for regular checks on your progress. Tell your care team if your symptoms do not start to get better or if they get worse. You may need blood work done while taking this medication.

This medication may stain clothing and other fabrics, flooring, painted surfaces, marble, granite, plastics, and enamel.

Ask how many glasses of fluid you need to drink a day. You must not get dehydrated.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible:

  • Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
  • Dry cough, shortness of breath or trouble breathing
  • Heart muscle inflammation—unusual weakness or fatigue, shortness of breath, chest pain, fast or irregular heartbeat, dizziness, swelling of the ankles, feet, or hands
  • Kidney injury—decrease in the amount of urine, swelling of the ankles, hands, or feet
  • Kidney stones—blood in the urine, pain or trouble passing urine, pain in the lower back or sides
  • Liver injury—right upper belly pain, loss of appetite, nausea, light-colored stool, dark yellow or brown urine, yellowing skin or eyes, unusual weakness or fatigue
  • Mesalamine intolerance syndrome—stomach pain or cramping, bloody diarrhea, nausea, vomiting, headache, muscle pain, fever, rash
  • Rash, fever, and swollen lymph nodes
  • Redness, blistering, peeling, or loosening of the skin, including inside the mouth

Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):

  • Diarrhea
  • Headache
  • Nausea
  • Runny or stuffy nose
  • Sensitivity to light
  • Sore throat
  • Stomach pain

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Where should I keep my medication?

Keep out of the reach of children.

Store at room temperature or in a refrigerator below 25 degrees C (77 degrees F). Do not freeze. Protect from heat. Protect from light and moisture. Throw away any unused medicine after the expiration date.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

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Note: Introduction and Additional Common Questions written and medically approved by Cleveland Clinic professionals.

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