Medication leaflets

Active substance

Results for the substance dextromethorphan

19 results

About this active substance

Dextromethorphan is a medication used to relieve dry, nonproductive cough. It works on the central nervous system by suppressing the cough reflex without affecting respiratory activity. It is commonly used for colds, flu, or other respiratory conditions involving irritating cough.

It is available in the form of syrups, tablets, or capsules and is often included in combination cold and flu medications. Its effect typically begins within 15-30 minutes and lasts about 6 hours.

Side effects may include dizziness, drowsiness, nausea, or, rarely, allergic reactions. At high doses, dextromethorphan can cause psychoactive effects, so misuse is strongly discouraged.

It is contraindicated in patients taking monoamine oxidase inhibitors (MAOIs) or those with productive (mucus-producing) cough. It is important to use it as directed by a doctor or the product label.