Relex cough syrup, a combination of Diphenhydramine Hydrochloride, Sodium Citrate and Ammonium Chloride, is an antitussive and expectorant cough mixture. Diphenhydramine is an antihistamine that relieves congestion and post-nasal drips. Ammonium Chloride is the expectorant which thins mucus. Sodium Citrate is a mucolytic, an agent which breaks down mucus, so that coughing up phlegm is easier. Symptomatic relief of perennial and seasonal allergic rhinitis, vasomotor rhinitis and allergic conjunctivitis, temporary relief of runny nose and sneezing caused by common cold.
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