Health Guide
Drug Guide

Methacholine (By breathing)

Methacholine (meth-a-KOE-leen)

Used as part of a medical test of the lungs.

Brand Name(s):


There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

You should not receive this medicine if you have had an allergic reaction to methacholine or similar medicines. Make sure your doctor knows about any allergies to medicine you may have. You should not receive this medicine at the same time that you are having an asthma attack, wheezing, trouble breathing, or if you have a severe decrease in lung function. You should not receive this medicine if you are also taking a beta blocker. Beta blockers are usually used to treat heart or blood pressure problems. Examples include atenolol (Toprol®), metoprolol, or propranolol. Make sure your doctor knows about all of the medicine you are taking.

How to Use This Medicine:

Liquid Under Pressure

Drugs and Foods to Avoid:

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

Warnings While Using This Medicine:

Possible Side Effects While Using This Medicine:

Call your doctor right away if you notice any of these side effects:

If you notice these less serious side effects, talk with your doctor:

If you notice other side effects that you think are caused by this medicine, tell your doctor

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

Last Updated: 12/12/2016

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Thomson & A.D.A.M