AMMONIAC 539 



including hysteria, chorea and convulsions. The emulsion 

 may be given in enema to dogs, in the two latter disorders. 

 Finally, tincture of asafetida is recommended to be 

 added to alcoholic liquors in veterinary practice to prevent 

 their " misappropriation " by stable attendants. 



Ammootacum. Ammoniac. (U. S. & B. P.) 



Synonym. — Gummi-resina ammoniacum, E. ; ammoniar 

 que, gommresine ammoniaque, Fr.; ammoniakgummi, G. 



A gum resin obtained from Dorema Ammoniacum Don 

 (nat. ord. Umbelliferse). 



Habitat. — Eastern Persia and Turkestan. 



Properties. — In roundish tears, from 2 to 6 Mm. or more 

 in diameter ; externally pale yellowish-brown, internally 

 milk-white ; brittle when cold, and breaking with a flat, 

 conchoidal and waxy fracture ; or the tears are superficially 

 united into irregular inasses without any intervening dark- 

 colored substance. It has a peculiar odor and a bitter, acrid 

 and nauseous 'taste. When triturated with water it readily 

 yields a milk-white emulsion. 



Gonstituents. — 1, a volatile oil, 1^-4 per cent. ; 2, a resin, 

 70 per cent. ;. 3, a gum, 20-28 per cent. 



Dose.—K.'& C, li.-ii. (30.-60.); Sh. & Sw., 3ii.-iv. 

 (8.-15.) ; D., gr.v.-xxx. (.3-2.) 



PBBPAEATIONS. 



Mistura Ammoniaci. (B. P.) 

 Dose.— D., §ss.-i. (15.-30.) 



Emplastrum Ammoniacum cum Hydrargyro. Ammoniac Plaster 

 with Mercury. (B. P.) 



Administration. — In emulsion, ball or pill. 



ACTION AND USES. 



Ammoniac is a drug of minor importance, resembling 

 asafoetida and containing a small quantity of a volatile oil 

 having the same action as other oils of this class. Am- 



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