Chlorpheniramine / methscopolamine Side Effects
Applies to chlorpheniramine / methscopolamine: oral liquid, oral suspension extended release, oral tablet chewable extended release, oral tablet extended release.
Do not use chlorpheniramine and methscopolamine if you have used an MAO inhibitor such as isocarboxazid (Marplan), phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam), or tranylcypromine (Parnate) within the past 14 days. Dangerous side effects may occur if you take chlorpheniramine and methscopolamine before the MAO inhibitor has cleared from your body.
Do not use this medication if you are allergic to chlorpheniramine or methscopolamine, or if you have severe high blood pressure or coronary artery disease, narrow-angle glaucoma, a stomach ulcer, or if you are unable to urinate.
Do not use this medication during an asthma attack.
This medication can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
Avoid becoming overheated in hot weather. Chlorpheniramine and methscopolamine increases the risk of heat stroke because it causes decreased sweating and can make you more sensitive to sunlight.
Avoid drinking alcohol. It can increase some of the side effects of chlorpheniramine and methscopolamine.
Avoid using other medicines that make you sleepy (such as cold medicine, pain medication, muscle relaxers, and medicine for seizures, depression or anxiety), or medicines that may cause restlessness (such as caffeine, stimulants, diet pills, and decongestants contained in over-the-counter cold medicines). They can add to the side effects of chlorpheniramine and methscopolamine.
Get emergency medical help if you have any of these signs of an allergic reaction while taking chlorpheniramine / methscopolamine: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using chlorpheniramine and methscopolamine and call your doctor at once if you have any of these serious side effects:
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problems with balance or coordination;
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severe drowsiness, feeling light-headed, fainting;
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extreme thirst and hot, dry skin;
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breathing problems;
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easy bruising or bleeding, unusual weakness;
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fever, chills, body aches, flu symptoms;
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fast or uneven heart beats;
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tight feeling in your chest;
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seizure (convulsions);
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hallucinations (seeing things that are not there); or
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tremors.
Continue using this medication and talk with your doctor if you have any of these less serious side effects:
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dry mouth, stomach pain, changes in appetite;
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drowsiness, dizziness, weakness, headache;
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dry eyes, blurred vision;
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painful or difficult urination;
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increased sweating;
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skin rash; or
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feeling nervous or excited (especially in children).
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
More about chlorpheniramine / methscopolamine
- Check interactions
- Compare alternatives
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- Side effects
- Dosage information
- Drug class: upper respiratory combinations
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Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Some side effects may not be reported. You may report them to the FDA.
