Benylin Day & Night Tablets Benylin Day & Night Tablets relieve the symptoms of cold & flu. Each pack contains two types of tablets, formulated differently to provide the specific relief you need during the day & at night. The day time tablets contain: Paracetamol: an analgesic & antipyretic which helps to relieve pain & fever. Pseudoephedrine hydrochloride: a decongestant which unblocks stuffy noses. The night time tablets contain: Paracetamol: an analgesic & antipyretic which helps to relieve pain & fever. Diphenhydramine hydrochloride: an antihistamine which helps clear catarrh & so aids sleep. Benylin Day & Night Tablets are suitable for adults & children aged over 12 years.