Dextromethorphan Hydrobromide (HBr) is a medication commonly used as a cough suppressant. It is an active ingredient found in many over-the-counter cough and cold medications. Dextromethorphan works by suppressing the cough reflex in the brain, specifically by acting on the cough center in the medulla oblongata. It is often used to relieve coughing due to the common cold, flu, or other respiratory illnesses. It's important to use dextromethorphan as directed and to be cautious about potential interactions with other medications or substances. Additionally, misuse or overuse of dextromethorphan can lead to adverse effects, including dizziness, drowsiness, nausea, and in high doses, it can even produce hallucinogenic effects. Always consult with a healthcare professional before using any medication, especially if you have underlying health conditions or are taking other medications.