Acid, Carbolic: as inhalation or as spray.
Acid, Gallic: in profuse discharge.
Acid, Nitric: in mixtures, to remedy the effect on digestion produced by sedatives like opium.
Acid, Sulphurous: as inhalation or spray.
Alum: in children with copious expectoration in doses of 3 grn.
Ammonia: when there is difficulty in bringing up expectoration.
Ammoniac: very useful, especially in elderly people.
Ammonium Chloride: to render the secretion less viscid.
Anemonin.
Antimony: when secretion is scanty.