Amydramine Sugar Free Expectorant Syrup contains Ammonium Chloride, Diphenhydramine Hcl, and Sodium Citrate as active ingredients. Ammonium Chloride due to its irritative action on the bronchial mucosa causes the production of respiratory tract fluid which in order facilitates the effective cough. Sodium citrate is a mucolytic which thins and loosens mucus (phlegm), making it easier to cough out. Diphenhydramine relieve cough caused by minor throat or airway irritation.