Hydryllin

Hydryllin is an oral syrup used primarily for the relief of cough, wheezing, chest congestion, and symptoms associated with asthma, bronchitis, and emphysema. It is a combination drug containing aminophylline (a bronchodilator that relaxes bronchial smooth muscle), diphenhydramine (an antihistamine that antagonizes histamine H1 receptors to reduce allergic reactions), ammonium chloride (an expectorant that helps loosen mucus), and menthol (which soothes the throat). The combined action of these ingredients provides symptomatic relief by opening airways, reducing allergic responses, thinning mucus for easier expulsion, and soothing irritated mucous membranes[3][4][5][8].

Brand names

Hydryllin

Other names

diphenhydramine + ammonium chloride + menthol + aminophylline