uV 



202 SYNOPSIS OF VETERINARY 



Dose. — Horse, iV 2 to 3 drs. ; dogs, 2 to 10 ms. 



tinctura arnicae radicis — Tr. Arnica Root. (Strength 

 10 per cent.) 



This is the best and most used. 



Dose. — Horse, 2 drs. to y 2 oz. every 3 hours to maintain the 

 circulation of the skin ; as a diaphoretic 1 to 2 ozs. combined with 

 other diaphoretics. Dogs, 5 to 30 ms. 



There is also a Tincture Arnica Florum. — (Strength 20 per 

 cent.) 



Dose the same as the Tr. of the Root, but the Root is the 

 best. 



Composition. — An active principle called arnicin. The root 

 contains au essential oil, on which depends in great part its phy- 

 siological activity. 



Antagonists and Incompatibles.— -Its actions are antagonized 

 by ammonia, alcoholic stimulants, opium, camphor, etc. 



Synergists. — Aconite, veratrum viride, digitalis and arterial 

 sedatives, generally increase the effects of arnica. 



Physiological Actions. — Arnica is irritant, stimulant, depres- 

 sant; antipyretic, diuretic, diaphoretic and is used as a vulnerary, 

 it dilates the cuticular blood vessels. It irritates the gastroin- 

 testinal tract. In alcoholic solution (as the Tr.) it inflames the 

 skin when used full strength. 



In small doses it increases the action of the heart, raises ar- 

 terial tension and stimulates the action of the skin and kidneys. 



Large doses produce a transient excitement, followed by de- 

 pressed circulation, respiration and temperature. 



Toxic Doses cause violent headache, dilated pupil and mus- 

 cular paresis ; it paralyzes the nervous system of animal and 

 organic life, causing collapse and death. 



Uses. — Is remarkably efficient as a diaphoretic in 1, iy 2 , or 

 2 oz. doses diluted in one pint of water ; l / 2 oz. fluid extract pilo- 

 carpus may be added at the outset of inflammatory diseases of 

 any kind, such as lymphangitis, laminitis, pulmonary diseases, etc. 

 Excellent to stop a chill and prevent the following fever or in- 

 flammatory action. It does this by dilating the blood vessels of 

 the skin, thus attracting the blood to the surface and away from 

 congested internal organs. It is indicated in sthenic fever of any 

 kind; azoturia, rheumatism, especially inflammatory or articular; 



