Dexchlorpheniramine / Dextromethorphan / Pseudoephedrine Side Effects

Medically reviewed by Drugs.com. Last updated on Dec 27, 2024.

Applies to dexchlorpheniramine / dextromethorphan / pseudoephedrine: oral liquid.

Get emergency medical help if you have any of these signs of an allergic reaction while taking dexchlorpheniramine / dextromethorphan / 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, slow, or uneven heart rate;

• severe headache, mood changes, hallucinations;

• severe dizziness or anxiety, feeling like you might pass out;

• tremor, seizure (convulsions);

• easy bruising or bleeding, unusual weakness;

• fever;

• little or no urinating;

• shortness of breath; or

• dangerously high blood pressure (severe headache, blurred vision, buzzing in your ears, anxiety, confusion, chest pain, uneven heartbeats, seizure).

Common side effects may include:

• mild headache;

• mild dizziness, drowsiness;

• dry mouth, nose, or throat;

• nausea, diarrhea, constipation, upset stomach;

• feeling nervous, restless, or irritable;

• blurred vision; or

• sleep problems (insomnia).

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

See also:

Further information

Dexchlorpheniramine/dextromethorphan/pseudoephedrine side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer