AMMONI′ACUM

Syn. Gum ammoniacum, G. ammo′′niac †; Gomme ammonia que , Fr.; Ammoniak , Ger. A gummy-resinous exudation from the stem of dorema ammoniacum , in tears and ma es, of a pale cinnamon colour, brittle, and when broken has a white and shining surface. Collected in Persia and the Punjaub. (B. P.) Gum ammoniacum has an unpleasant odour, especially when heated, and a nauseous and slightly bitter taste. It is a mild, stimulating expectorant and emmenagogue; and its effects on the system resemble those of a afœtid a except in being weaker. Externally, it is resolvent.— Dose , 10 to 30 gr. in pills or emulsion. Doses for Animals. Horse , 2 to 4 drachms. Cattle , 2 to 4 drachms. Sheep , 1 ⁄ 2 to 1 1 ⁄ 2 drachm. Pig , 1 ⁄ 2 to 1 1 ⁄ 2 drachm. Dog , 10 to 20 grains. Either by bolus or emulsion.