46 VETERINARY MATERIA MEDICA. 



creased by acids and alkalies. Dose: H., gr. v.-x. ; 



I^-j gi"- T^5~To") after feeding. 



Liquor Potassii Arsenitis — solution of potassium 

 arsenite, Fowler's solution, contains one per cent, of 

 arsenious acid . It is prepared by heating in a flask : 

 Potassium carbonate and arsenious acid, of each gr. 

 Ixxxvij; distilled water, Oi. Dose: H., fl. 3 ss.-i. ; 

 D., TTi ij.-xv., after feeding. 



Physiological Action. — Arsenic is a powerful 

 escharotic and excites violent inflammation locally ; 

 given internally, it is a powerful irritant to the gas- 

 tro-intestinal and bronchial mucous membranes, and 

 should always be given after feeding. Small doses 

 act as a stomachic tonic, promoting the appetite and 

 digestion, increase cardiac action, respiratory power, 

 and the secretions of the intestinal canals ; also stim- 

 ulate intestinal peristalsis and increase the sexual 

 appetite. Full medicinal doses, if continued, cause 

 oedema and itching of the eyelids, increased saliva, 

 nausea, vomiting of mucus, diarrhoea or dysentery, 

 enfeebled heart, soreness to the touch over epigas- 

 tric region, itchy skin with small eruptions, jaun- 

 dice, and albuminuria. Toxic doses produce colicky 

 pains, vomiting, great thirst, dysentery, strang- 

 ury, suppressed or bloody urine, rapid feeble heart, 

 cold breath, and collapse. Post-mortem examination 

 shows ecchymotic spots, erosions, softening of the 

 gastro-intestinal mucous membranes, fatty degenera- 

 tion of internal organs, especially kidney and liver; 

 also congestion of lungs and bronchial mucous mem- 

 branes. 



