Robitussin is an over-the-counter medication commonly used to relieve coughs and chest congestion. It contains active ingredients like dextromethorphan, which suppresses the cough reflex, and guaifenesin, which helps loosen mucus in the airways. Robitussin is available in various formulations, including liquids and capsules, to suit different preferences. This medication is often used for symptoms associated with colds, flu, or allergies. It is important to follow the dosage instructions on the label and consult a healthcare professional if symptoms persist or worsen. Always check for potential interactions with other medications before use.