A cough suppressant is a type of medication designed to reduce the urge to cough. It works by acting on the brain's cough center, helping to alleviate persistent coughing that can be caused by conditions like the common cold or allergies. Common active ingredients in cough suppressants include dextromethorphan and codeine. These medications are available in various forms, such as syrups, tablets, and lozenges. While they can provide relief, it's important to use them as directed and consult a healthcare professional if symptoms persist. Overuse can lead to side effects or mask underlying health issues.