AGENTS PROMOTING WASTE. C3 



tering the air passages. Large concentrated doses 

 given internally will cause violent gastro-enteritis 

 and paralj^sis of the brain centres from absorption. 

 Medicinal doses stimulate the vasomotor centre by 

 reflex action and raise blood pressure. After absorp- 

 tion there is direct stimulation of the respiratory and 

 circulatory nerve centres and promotion of the secre- 

 tions of skin and mucous surfaces. It is given inter- 

 nally as an antacid, a diffusible stimulant, antispas- 

 modic, and stimulant expectorant; externally as a 

 stimulant, counter-irritant, and vesicant. 



Antidotes for poisoning by liquor ammonise are 

 vinegar and dilute acids with diluents and demul- 

 cents. 



Spiritus ammoniae aromaticus conjoins the proper- 

 ties of its constituents (ammonium carbonate and 

 water of ammonia). 



Ammonium carbonate is more permanent in its ef- 

 fects than the liquor ammoniae, but not quite so pow- 

 erful. It is a good antacid, and diffusible stimulant; 

 small doses promote secretion of gastric juice, larger 

 doses relieve flatulence and spasm. It is a good car- 

 diac and respiratory stimulant, and promotes bron- 

 chial secretion and expectoration. Toxic doses are 

 irritant, cause primary stimulation and secondary 

 paralysis of the cord and motor centres. 



Ammonium chloride is a stimulant to the alimen- 

 tary and respiratory mucous membranes in moderate 

 doses, promoting their secretions. It has marked 

 cholagogue powers and promotes excretion of urea. 

 Externally it makes a very serviceable cooling lotion. 



