Carbonate of Ammonia. Sesqui-carbonate of Ammonia (Ph. Lond. and Dub.). Called also the Sub-carbonate of Ammonia. Volatile, or Smelling Salts. Salts of Hartshorn. Baker's Salt. A compound of Carbonic Acid 55.93, Ammonia 28.81, Water 15.26, in 100 parts. 2NH4O, 3CO2.

* Garrod, Med. Times and Gazette, Feb. 6, 1864, p. 147. Lancet, Sept. 26, 1863, p. 365.

Lancet, Jan. 3, 1S63, p. 11. § Ibid. || Ibid.

Med. Prop. and Action. Antacid, stimulant, diaphoretic, and expectorant, in doses of gr. v. - xv. It is preferable to all the other alkaline carbonates, in cases where the vital powers are much depressed. It is emetic in doses of gr. xxx.; in larger doses it causes colic, convulsions, and great disturbance of the nervous system. If taken for a long period, it occasions much itching of the scalp, and the skin generally. In inducing a liquid state of the blood, and in other respects, it resembles the other salts of Ammonia (see sect. 128). It is very valuable as " smelling salts," in syncope, hysteria, and asphyxia. It is occasionally used for making effervescing draughts; 20 grs. of the sesqui-carbonate = 6 fl. drs. of lemon-juice = 24 grs. of Citric Acid = 26 grs. of Tartaric Acid. The two former, the Citrate of Ammonia, and the latter, the Tartrate, are very useful refrigerants in febrile attacks and in gastric-irritation.

Offlc. Prep. Spiritus Ammonias Aromaticus. (See Art. Ammonia Sp. Arom.)

Dose. As a stimulant and diaphoretic gr. v. - gr. xv. As an emetic gr. xxx.

Incompatibles. Mineral acids; Potash; Soda; Lime; Lime-water; Magnes. Carb.; Magnes. Sulph.; Alum; Salts of Iron, except the Tartrate; Sulphate of Zinc; Chloride and Bichloride of Mercury; the Acetate and Subacetate of Lead.

145. Therapeutic Uses

Acidity of the Prima; Via;, Heartburn, Flatulence. In these affections, particularly when occurring in cases of Atonic Dyspepsia, or in hysterical females, the Sesqui-carbonate, in doses of gr. v. - viij. in some aromatic water, proves very efficacious. It may be repeated, if necessary.

146. Asthma

In those forms of Asthma arising from, or connected with disease of the heart, Dr. Hope * states that he has derived more benefit from this salt, in doses of gr. x. - xv., than from any other remedy. In a very obstinate case which resisted all other medicines, the following formula afforded great relief: -

146 Asthma 15 Ammon. Sesquicarb. gr. viij., Antim. Tart. gr. 1/4, Aq. Anisi fiss., M. ft. haust, alterna hora sumend.