Dextromethorphan is a medication commonly found in cough syrups and other over-the-counter cold and flu remedies. While it can be abused, it is not considered to be addictive like other drugs of abuse, such as opioids or stimulants. However, high doses of dextromethorphan can cause a range of physical and psychological effects, including hallucinations, dissociation, confusion, dizziness, and nausea. It is important to follow the recommended dosages and use caution when taking any medication.