Carbinoxamine / Dextromethorphan / Phenylephrine Side Effects

Applies to carbinoxamine/dextromethorphan/phenylephrine: oral liquid.

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using this medication and call your doctor at once if you have any of these serious side effects:

• feeling light-headed, fainting;

• urinating less than usual or not at all;

• wheezing, tightness in your chest;

• fast or pounding heartbeat; or

• pale skin, easy bruising or bleeding.

Keep taking the medication and talk to your doctor if you have any of these less serious side effects:

• drowsiness, dizziness;

• lack of coordination;

• upset stomach;

• stuffy nose, chest congestion;

• sleep problems (insomnia);

• feeling restless or excited (especially in children);

• dry mouth or nose; or

• blurred vision.

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.

See also:

For healthcare professionals

Applies to carbinoxamine / dextromethorphan / phenylephrine: oral liquid.

Cardiovascular adverse events

Cardiovascular side effects have included pallor, arrhythmias and increased heart rate or blood pressure.^[Ref]

Nervous system

Nervous system side effects have included sedation, dizziness, headache, nervousness, convulsions, central nervous system stimulation, hallucinations, tremor, insomnia, and weakness.^[Ref]

Ocular

Ocular side effects have included diplopia.^[Ref]

Respiratory

Respiratory side effects have included respiratory difficulty.^[Ref]

Gastrointestinal

Gastrointestinal side effects have included nausea, vomiting, anorexia, heartburn and diarrhea.^[Ref]

Genitourinary

Genitourinary side effects have included dysuria and polyuria.^[Ref]

Further information

Carbinoxamine/dextromethorphan/phenylephrine 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