Used as a cough suppressant in over-the-counter cold and cough medications. It acts on the central nervous system to reduce the activity of the cough reflex. Commonly found in liquid and tablet formulations for symptomatic relief of non-productive cough. It is favored for its lack of analgesic or addictive properties, making it a safer alternative to opioid-based cough suppressants. Also being studied for potential neuroprotective effects in certain neurological conditions.