Chlorpheniramine / Dextromethorphan / Methscopolamine Side Effects

Applies to chlorpheniramine/dextromethorphan/methscopolamine: oral tablet extended release.

Get emergency medical help if you have any of these signs of an allergic reaction while taking chlorpheniramine/dextromethorphan/methscopolamine: 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;

• pounding heartbeats or fluttering in your chest;

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

• severe headache, double vision;

• fever, ongoing diarrhea or vomiting;

• little or no urinating;

• easy bruising or bleeding, unusual weakness; or

• tremor, seizure (convulsions).

Common side effects may include:

• dizziness, drowsiness;

• dry mouth, decreased sense of taste;

• nausea, diarrhea, constipation, bloating;

• decreased sweating;

• blurred vision;

• sleep problems (insomnia); or

• feeling nervous, restless, or irritable;.

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

For healthcare professionals

Applies to chlorpheniramine / dextromethorphan / methscopolamine: oral tablet extended release.

Cardiovascular adverse events

Cardiovascular side effects have included bradycardia, tachycardia, flushing, and, palpitations.^[Ref]

Gastrointestinal

Gastrointestinal side effects have included nausea, xerostomia, diarrhea, abdominal pain, appetite increase, weight gain, constipation, and dysphagia.^[Ref]

Ocular

Ocular side effects have included mydriasis, diplopia, and blurred vision.^[Ref]

Musculoskeletal

Musculoskeletal side effects have included arthralgia and weakness.^[Ref]

Nervous system

Nervous system side effects have included headache, excitability, irritability, fatigue, nervousness, dizziness, drowsiness, confusion, and memory impairment.^[Ref]

Genitourinary

Genitourinary side effects have included urinary retention.^[Ref]

Renal

Renal side effects have included polyuria.^[Ref]

Respiratory

Respiratory side effects have included pharyngitis.^[Ref]

See also:

Further information

Chlorpheniramine/dextromethorphan/methscopolamine 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