It’s the time of year when we’re all stuck inside due to the low temperatures, so it can only mean one thing: Almost everyone is getting sick. The icky bugs that cause colds, influenza, COVID and RSV ...

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Background: Dextromethorphan (DM), the d-isomer of the codeine analog levorphanol, is an active ingredient present in a variety of cough and cold remedies. Recently, data generated from a study in ...

It acts centrally and elevates the threshold for coughing. It is about equal to codeine in depressing the cough reflex. In therapeutic dosage dextromethorphan does not inhibit ciliary activity.