Last updated on RxList: 8/11/2017
Cantil Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Last reviewed on RxList 8/11/2017

Cantil (mepenzolate bromide) is an anticholinergic drug used to treat peptic ulcers of the stomach. Cantil does not help heal an ulcer. Common side effects of Cantil include:

  • dry mouth
  • decreased sweating
  • dizziness
  • drowsiness
  • headache
  • blurred vision
  • widened pupils
  • nausea
  • vomiting
  • constipation
  • memory problems
  • problems with balance or coordination
  • bloating

The usual adult dose of Cantil is 1 or 2 tablets (25 or 50 mg) 4 times a day preferably with meals and at bedtime. Cantil may interact with amantadine, nitroglycerin, heart rhythm medicines, sedatives, antidepressants, medicines to treat Parkinson's disease, and cold or allergy medicines containing antihistamines. Tell your doctor all medications and supplements you use. During pregnancy, Cantil should be used only if prescribed. It is unknown if this drug passes into breast milk. Consult your doctor before breastfeeding.

Our Cantil (mepenzolate bromide) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.


Super Tips to Boost Digestive Health: Bloating, Constipation, and More See Slideshow
Cantil Consumer Information
SIDE EFFECTS: Dry mouth, decreased sweating, dizziness, drowsiness, blurred vision, widened pupils, nausea/vomiting, or constipation may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these unlikely but serious side effects occur: mental/mood changes, eye pain/pressure, fast/pounding heartbeat, difficulty urinating, decreased sexual ability.

A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

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

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Read the entire patient information overview for Cantil (Mepenzolate Bromide)


Pancreatitis is inflammation of an organ in the abdomen called the pancreas. See Answer
Cantil Professional Information


Precise frequency data from controlled clinical studies with CANTIL are not available.

Gastrointestinal System: vomiting, nausea, constipation, loss of taste, bloated feeling, dry mouth

Central Nervous System: mental confusion, dizziness, weakness, drowsiness, headache, nervousness

Ophthalmologic: increased ocular tension, cycloplegia, blurred vision, dilation of the pupil

Dermatologic-Hypersensitivity: anaphylaxis, urticaria

Cardiovascular: tachycardia, palpitations

Genitourinary: urinary retention, urinary hesitancy

Miscellaneous : decreased sweating, drowsiness, insomnia, impotence, suppression of lactation

Drug Abuse And Dependence

Tolerance, abuse, or dependence has not been reported with CANTIL.

Read the entire FDA prescribing information for Cantil (Mepenzolate Bromide)

© Cantil Patient Information is supplied by Cerner Multum, Inc. and Cantil Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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