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Chlorpheniramine / methscopolamine / pseudoephedrine Side Effects

Applies to chlorpheniramine / methscopolamine / pseudoephedrine: oral syrup, oral tablet extended release

Get emergency medical help if you have any of these signs of an allergic reaction while taking chlorpheniramine / methscopolamine / pseudoephedrine: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using this medicine and call your doctor at once if you have:

  • fast or uneven heart rate;

  • pounding heartbeats or fluttering in your chest;

  • painful or difficult urination, little or no urinating;

  • tremors, seizure (convulsions); or

  • mood changes, severe dizziness or anxiety, double vision, hallucinations.

Common side effects may include:

  • headache, dizziness, drowsiness;

  • dry mouth, nose, or throat;

  • nausea, loss of appetite, diarrhea, constipation;

  • blurred vision;

  • sleep problems (insomnia); or

  • feeling restless or excited (especially in children).

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

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.

More about chlorpheniramine/methscopolamine/pseudoephedrine

Consumer resources

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Professional resources

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