Coflax Cough Syrup is used for Breathing difficulties, Asthma, Nasal swelling, Cold or allergies, Allergy, Hay fever, Common cold, Watery eyes, Itchy throat/skin, Anaphylactic shock and other conditions. Coflax Cough Syrup may also be used for purposes not listed in this medication guide.Coflax Cough Syrup contains Ammonium Dichloride, Chlorpheniramine Maleate, Ephedrine Hcl, Menthol and Sodium Citrate as active ingredients. Coflax Cough Syrup works by relaxing the air passages and constricting the blood vessels; blocking H1-receptor sites on tissues; regulating the intake of sodium and potassium; temporarily relieving minor pain.