Benylin Four Flu tablets contain a combination of active ingredients to provide effective relief from the four main symptoms of Flu, the fever, body aches & pains, nasal congestion and coughing. Paracetamol reduces your temperature and relieves the shivers aches and pains. Diphenhydramine an antihistamine relieves your cough and dries up your runny nose and the decongestant Pseudoephedrine unblocks congested noses and sinuses . Take at the first sign of colds and flu and get on with your day.