An expectorant is a type of medication that helps clear mucus and phlegm from the airways, making it easier to breathe. It works by thinning the mucus, which allows it to be coughed up more easily. Expectorants are commonly used to treat conditions like colds, bronchitis, and other respiratory infections. One of the most well-known expectorants is guaifenesin, which is found in many over-the-counter cough and cold medications. By promoting the expulsion of mucus, expectorants can help relieve symptoms associated with congestion and improve overall respiratory function. Always consult a healthcare professional before using any medication.