Cantil Side Effects Center

Last updated on RxList: 3/15/2023
Cantil Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

What Is Cantil?

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

What Are Side Effects of Cantil?

Cantil may cause serious side effects including:

  • hives,
  • difficulty breathing,
  • swelling of your face, lips, tongue, or throat,
  • mental or mood changes,
  • eye pain or pressure,
  • fast or pounding heartbeat,
  • difficulty urination,
  • decreased sexual ability,
  • rash,
  • itching, and
  • severe dizziness

Get medical help right away, if you have any of the symptoms listed above.

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

Seek medical care or call 911 at once if you have the following serious side effects:

  • Serious eye symptoms such as sudden vision loss, blurred vision, tunnel vision, eye pain or swelling, or seeing halos around lights;
  • Serious heart symptoms such as fast, irregular, or pounding heartbeats; fluttering in your chest; shortness of breath; and sudden dizziness, lightheartedness, or passing out;
  • Severe headache, confusion, slurred speech, arm or leg weakness, trouble walking, loss of coordination, feeling unsteady, very stiff muscles, high fever, profuse sweating, or tremors.

This document does not contain all possible side effects and others may occur. Check with your physician for additional information about side effects.

Dosage for Cantil

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.

What Drugs, Substances, or Supplements Interact with Cantil?

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.

Cantil During Pregnancy or Breastfeeding

During pregnancy, Cantil should be used only if prescribed. It is unknown if this drug passes into breast milk. Consult your doctor before breastfeeding.

Additional Information

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 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)


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

© 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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