410 VEGETABLE DRUGS 



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the bowels after the occurrence of purgation. Rhubarb^ by virtue of 

 chrysophanic acid, stains the feces, urine, milk and sweat yellow in its 

 excretion. 



Uses. — Rhubarb is an efficient laxative remedy for the treatment of 

 indigestion in young animals associated with diarrhea. In this condition 

 it sweeps out the source of irritation and then exerts an astringent effect. 

 The drug often acts most favorably with an antacid in the disorders 

 noted. Gregory's powder is useful in the care of foals, calves and lambs 

 with diarrhea. The fluidextract may be given to dogs, but rhubarb is not 

 so generally useful a purgative for these animals as castor oil, calomel, 

 cascara sagrada, phenolphthalein, or compound laxative pills. Rhubarb 

 has been recommended when a laxative is desirable, in cases of hemor- 

 rhoids, to improve local tone, and also as a purgative in diarrhea of young 

 animals due to worms. 



Diarrhea in Foals and Calves. 



Pulveris rhei compositi Sii. 



Sig. 1 tablespoon ful in milk 3 times daily. 



Diarrhea in dogs. 

 If 



Olei ricini. 



Syrupi rhei aromatici aa oi- 



M. 



Sig. Give at once in one dose. 



One or two drops of the tincture of rhubarb in the drinking water 

 form a serviceable laxative for small birds. 



Chrysarobinum. Chrysarobin. CaoHzoO,. (U. S. & B. P.) 



Synonym. — Chrysarobine, Fr. ; araroba depurata, G. 



A neutral principle, extracted from Goa powder, a substance found deposited 

 in the wood of Vouacapoua Araroba (Aguiar) Druce (nat. ord. Leguminosae). 



Habitat. — Brazil. 



Properties. — A pale orange-yellow, microcrystalline powder, odorless and 

 tasteless; turning brownish-yellow on exposure to the air. Very slightly soluble 

 in cold water or alcohol. Soluble in chloroform and solutions of alkalies. 



It is oxidized into chrysophanic acid (CisHmOj), and glucose. 



PREPARATION. 



Unguentum Chrysarobini. Chrysarobin Ointment. (U. S. & B. P.) 

 Chrysarobin, 6; benzoinated lard, 94.. (U. S.) 



Action and Uses. — Chrysarobin is a powerful irritant to the skin and 

 destroys parasites. It stains the skin and other materials dark brown. 

 This may be removed, unless fixed by an alkali, with a weak solution of 

 chlorinated lime or caustic soda. Chrysarobin is also a strong irritant in 

 the gastro-intestinal tract, causing vomiting and purging in carnivora. It 

 is eliminated by the kidneys, coloring the urine yellow. 



Chrysarobin is used as a parasiticide in the treatment of ringworm, 

 and as a stimulant to the skin in chronic cutaneous disorders, particularly 

 psoriasis and eczema (with much itching and scaling), and in alopecia 

 areata. The official 5 per cent, ointment should be diluted 2 or 3 times 

 for delicate skins. It should be applied over a large area with care, but 

 is one of the most efficient remedies in obstinate diseases of the skin. In 



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