Mepenzolate reduces stomach acid and helps control muscle spasms in the intestines.

Mepenzolate is used to treat peptic ulcers of the stomach. Mepenzolate does not help heal an ulcer.

Mepenzolate may also be used for purposes other than those listed in this medication guide.

You should not take this medication if you are allergic to mepenzolate, or if you have problems with urination, a blockage in your intestines, severe ulcerative colitis, glaucoma, or myasthenia gravis.

Before taking mepenzolate tell your doctor if you have diarrhea, numbness or tingling in your hands or feet, liver or kidney disease, ulcerative colitis, heart disease, high blood pressure, overactive thyroid, hiatal hernia, acid reflux disease, an enlarged prostate, asthma, or any allergies.

Mepenzolate can cause side effects that may impair your vision, thinking, or reactions. Be careful if you drive or do anything that requires you to be alert and able to see clearly.

Avoid drinking alcohol. It can increase some of the side effects of mepenzolate.

Avoid becoming overheated or dehydrated during exercise and in hot weather. Mepenzolate can decrease sweating, and you could develop heatstroke more easily.

Stop using mepenzolate and call your doctor at once if you stop urinating, or if you have hallucinations, confusion, unusual thoughts or behavior, or if you have fast, uneven, or pounding heartbeats.

You should not take this medication if you are allergic to mepenzolate, or if you have:

• problems with urination;

• a blockage in your intestines, paralytic ileus, severe ulcerative colitis, toxic megacolon;

• glaucoma; or

• myasthenia gravis.

If you have any of these other conditions, you may need a dose adjustment or special tests to safely take mepenzolate:

• diarrhea (especially if you have a colostomy or ileostomy);

• numbness or tingling in your hands or feet;

• liver or kidney disease;

• ulcerative colitis;

• overactive thyroid;

• congestive heart failure, a heart rhythm disorder, or coronary artery disease;

• high blood pressure (hypertension);

• hiatal hernia or acid reflux disease;

• an enlarged prostate; or

• asthma or any allergies.

FDA pregnancy category B. This medication is not expected to be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment.

It is not known whether mepenzolate passes into breast milk or if it could harm a nursing baby. Do not take mepenzolate without telling your doctor if you are breast-feeding a baby.

Older adults may be more likely to have side effects from mepenzolate.