BENYLIN® Extra Strength Mucus & Phlegm Syrup works in your lungs to break up tough mucus and phlegm, and clear it from your chest. This extra strength, fast-acting formula loosens and thins out mucus and phlegm so that you can expel it when you cough. The formula contains an expectorant and a menthol pain reliever for fast, effective relief of mucus and phlegm and chest congestion. BENYLIN® Extra Strength Mucus & Phlegm Syrup comes in 100-millilitre or 250-millilitre bottles.