548 VEGETABLE DRUGS 



emodin, a constituent of rhubarb as well, and rhamnose 

 (C„H,0,), by hydrolysis. 



Dose.—T>., 3ss.-i. (2.-4.). 



PREPARATIONS. 



Extractum Franguke Fluidum- Fluid Extract of Frangula. 



Made by maceration and percolation with alcohol and water, and 

 evaporation, so that 1 Cc of the preparation = 1 Gm. of the crude drug. 

 Dose.— D., 3ss.-i. (2.-4.). 



Extractum Rhamnce FrangulcB Liquidum. (B. P.) 

 Dose.— D., 3i.-iv.Y4.-15.). 



E.HAMNU8 Catharticus. (Non-official.) 



The berries of K. catharticus, from which an acrid^ 

 nauseous, bitter juice is obtained. A syrup — syrupus rhamni 

 cathartici — is prepared from the juice (B.P.) with sugar, 

 ginger and pimento. 



Dose of Syrup.— J)., l i.-ii. (30.-60.); Cats, I ss.-i. (15.-30.). 



Action and Uses. — The buckthorns are laxatives in the 

 doses employed in medicine. The fresh bark of R. frangula 

 produces violent gastro-enteritis (frangulin), and therefore 

 must be kept a year before using. The same remark applies 

 with less force to E,. Purshiana. Cascara sagrada is prob- 

 ably the best mild purgative remedy for dogs with chronic 

 constipation, and the dose does not require to be increased 

 on repetition. In fact, the tone of the bowels is improved by 

 the drug. It is more reliable and active than frangula. 

 Cascara may cause some griping. It is very bitter and 

 therefore may promote gastric digestion and appetite. The 

 aromatic fluid extract made by a well-known firm is a most 

 serviceable preparation in preventing colic and in disguising 

 the taste. The average dose for the dog is TTtxx.-xxx. each 

 night, or Tl^v.-x. thrice daily. The syrup of buckthorn is 

 commonly prescribed to dogs with castor oil, of each one 

 ounce ; or one drachm of the former with an ounce of the 

 latter, for an occasional purgative. 



