This medication works to loosen phlegm and mucous in the lungs. It is used to relieve a dry, nonproductive cough and enables "coughing up" of mucous.

This drug is used to relieve a dry cough and helps to loosen phlegm and mucous in the lungs so you can "cough-up" (expectorate) mucous.

Guaifenesin is an expectorant which helps to loosen mucus. Potassium guaiacolsulfonate is also an expectorant. This combination medication is used to treat a cough associated with the common cold, asthma, and other respiratory illnesses (e.g., sinusitis, pharyngitis, bronchitis).