Benylin day and night tablets work to relieve congestion bring down the fever and ease headaches body aches and pain it works to provide you rapid relief so you can carry on with your day active ingredients for effective relief benylin day and night tablets contain diphenhydramine to help relieve a runny nose pseudoephedrine to help contract the blood vessels in the nasal to relieve congestion and control the excess production of mucus paracetamol to help bring down a fever and provi