Actifed Syrup is a decongestant that helps relieve nasal congestion, blocked sinuses, and catarrh. It also contains an ingredient that works in two ways: an antihistamine action to relieve allergy symptoms such as sneezing, and a drying action to relieve symptoms of colds, flu, and hay fever like runny noses and watery eyes. This syrup can help relieve sneezing, reduce a runny nose, and alleviate symptoms of colds, flu, allergies, and hay fever.