Nighttime Cough Side Effects

Generic Name: dextromethorphan / doxylamine

Note: This document contains side effect information about dextromethorphan / doxylamine. Some of the dosage forms listed on this page may not apply to the brand name Nighttime Cough.

Some side effects of Nighttime Cough may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

Applies to dextromethorphan / doxylamine: oral liquid

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

Stop using dextromethorphan and doxylamine and call your doctor at once if you have:

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

  • little or no urinating; or

  • liver problems--nausea, upper stomach pain, itching, tired feeling, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Common side effects may include:

  • drowsiness, dizziness;

  • nervousness;

  • 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.

More about Nighttime Cough (dextromethorphan / doxylamine)

Consumer resources

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