BENYLIN® Chesty Coughs Original provides deep penetrating relief and a soothing effect that allows you to get on with your day. Active ingredient diphenhydramine hydrochloride is an antihistamine and works by relieving a cough. Diphenhydramine also helps dry nasal secretions by preventing the natural body chemical histamine from binding to its receptors and producing a runny nose. Levomenthol works to relieve stuffiness in the nose to help make breathing easier. Dosage: Adults and children aged 12 years and over: Take Two 5 ml spoonfuls every 4 - 6 hours, four times a day Not suitable for children under 12 years Do not take more than 4 doses in 24 hours. If symptoms persist, talk to your doctor or pharmacist.