Form, strength, instructions for use, etc.

If you have a certain type of ulcerative colitis, your doctor may suggest Canasa as a treatment option.

Canasa is a prescription medication used to treat mild to moderate ulcerative proctitis in adults. It comes in the form of a suppository that you take rectally.

Canasa contains the active ingredient mesalamine. An active ingredient is what makes a drug work. Mesalamine belongs to a group of medications called aminosalicylates.

This article describes the dosage of Canasa, as well as its strength and how to take the drug. To learn more about Canasa, check out this in-depth article.

To note: This article covers the usual dosage of Canasa, which is provided by the manufacturer of the drug. But when using Canasa, always take the dose prescribed by your doctor.

This section describes common prescribing information for Canasa. Before you start taking this medication, your doctor will discuss Canasa dosing instructions specific to your condition.

What is the shape of Canasa?

Canasa comes as a suppository that you take rectally (insert into your rectum).

How strong is Canasa?

Canasa suppositories are available in one strength: 1,000 milligrams (mg).

What are the usual dosages of Canasa?

The information below describes commonly used or recommended dosages. But be sure to take the dose your doctor has prescribed for you. They will determine the best dosage to meet your needs.

For the treatment of mild to moderate ulcerative proctitis, the recommended dosage for Canasa suppositories is 1000 mg once daily. Your doctor will likely advise you to take this medication at bedtime.

Is Canasa used long term?

It is not known if Canasa can be used safely for longer than 6 weeks.

Canasa is usually taken for 3-6 weeks depending on its effectiveness in relieving symptoms. Your doctor will tell you how long you need to take Canasa.

Canasa comes as a suppository that you take rectally once a day at bedtime. You will do this for 3 to 6 weeks or as long as your doctor advises.

You should not cut or break the suppository before inserting it into your rectum.

After inserting the suppository, try to keep it in your rectum for 1-3 hours, or longer if you can.

Your doctor may advise you to drink plenty of fluids while you are taking Canasa.

For more information on Canasa expiration, storage, and disposal, see this article.

Accessible medication containers and labels

If you have trouble reading the prescription label on your medications, talk to your doctor or pharmacist. Some pharmacies may provide medication labels that:

  • have large print or use Braille
  • feature a code you can scan with a smartphone to change text to audio

Your doctor or pharmacist may be able to recommend pharmacies that offer these accessibility features if your current pharmacy does not.

If you miss a dose of Canasa, take a dose as soon as you remember. Skip the missed dose if it is almost time for your next dose. Then take the next dose at the usual time. Avoid taking two suppositories to make up for a missed dose.

If you need help remembering to take your dose of Canasa on time, try using a medication reminder. This may include setting an alarm or downloading a reminder app to your phone.

Do not use more Canasa than your doctor has prescribed. Using more than that can cause serious side effects.

Overdose symptoms

Symptoms caused by an overdose of Canasa may include:

What to do if you take too much Canasa

Call your doctor right away if you think you have taken too much Canasa. You can also call 800-222-1222 to reach the American Association of Poison Control Centers or use their online resource. But if you have severe symptoms, immediately call 911 (or your local emergency number) or go to the nearest emergency room.

The sections above describe the usual dosage of Canasa provided by the drug manufacturer. If your doctor recommends Canasa, he will prescribe the dosage that is right for you.

Remember that you should not change your dose of Canasa without your doctor’s advice. Only take Canasa exactly as prescribed. Talk with your doctor if you have any questions or concerns about your current dosage.

Here are some questions you may want to ask your doctor:

  • Does my dose of Canasa need to be changed if I am taking other medications at the same time?
  • What should I do if I cannot store the Canasa suppository for the recommended time?
  • How long will I need to take Canasa for my condition?

For support and advice from others living with inflammatory bowel disease (IBD) such as ulcerative proctitis, join the Bezzy IBD Community. For treatment news and tips for managing your condition, sign up for Healthline’s IBD newsletter.

Disclaimer: Healthline has made every effort to ensure that all information is factually correct, complete and up-to-date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or other healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or for all specific uses.

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