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Ammonium chloride is used as an expectorant in cough medicine. Its expectorant action is caused by irritative action on the bronchial mucosa, which causes the production of excess respiratory tract fluid, which presumably is easier to cough up. Ammonium salts are an irritant to the gastric mucosa and may induce nausea and vomiting.
An expectorant increases bronchial secretions and mucolytics help loosen thick bronchial secretions. Expectorants reduce the thickness or viscosity of bronchial secretions, thus increasing mucus flow that can be removed more easily through coughing. Mucolytics break down the chemical structure of mucus molecules.
Sal ammoniac (ammonium chloride) has a history of being used as a cough medicine, as it works as an expectorant. [3] Finnish author Jukka Annala speculates that salty liquorice has its origins in pharmacy stores that manufactured their own cough medicine. [4]
Besides terpin hydrate, other expectorants lacking evidence of efficacy include ammonium chloride, beechwood creosote, benzoin preparations, camphor, eucalyptol/eucalyptus oil, iodines, ipecac syrup, menthol/peppermint oil, pine tar preparations, potassium guaiacolsulfonate, sodium citrate, squill preparations, tolu and turpentine oil. [1]
I think the point is not "should ammonium chloride be used as an expectorant?", but "is/has it been used as an expectorant?". According to a Google search for "ammonium.chloride expectorant", the answer to the latter question appears to be clearly "yes". The answer to the first question is the subject of the controversy here.
The substance acts on mucous membranes, restoring the physiological clearance mechanisms of the respiratory tract (which play an important role in the body's natural defence mechanisms) through several mechanisms, including breaking up phlegm, stimulating mucus production, and stimulating synthesis and release of surfactant by type II pneumocytes.
Syrup of ipecac (/ ˈ ɪ p ɪ k æ k /), or simply ipecac, is a drug that was once widely used as an expectorant (in low doses) and a rapid-acting emetic (in higher doses). It is obtained from the dried rhizome and roots of the ipecacuanha plant (Carapichea ipecacuanha), from which it derives its name. It is no longer regularly used in medicine.
Ammonium bicarbonate is an irritant to the skin, eyes and respiratory system. Short-term health effects may occur immediately or shortly after exposure to ammonium bicarbonate. Breathing ammonium bicarbonate can irritate the nose, throat and lungs causing coughing, wheezing and/or shortness of breath.
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