446 VEGETABLE DRUGS 



chloroform ; insoluble in water or ether. It contains digi- 

 toxin, digitalin, digitalein and digitonin, but mainly digi- 

 toxin, and is cumulative. Dose. — H. & C, gr.|-J (.015-.03); 



I>-,gr.^-^ (.001-002). 



2. Homolle's or Quevenne's digitalin, an amorphous, 

 whitish powder, or small scales ; very bitter, inodorous, and 

 soluble in 2,000 parts of water. It is composed largely of 

 digitalin, with a little digitoxin. Dose.—'S.. & C, gr.J (.015) 

 = gr.22| of digitalis leaves; D., gr.^V-Tir (■001-.002) = 

 gr.l|-3 of digitalis leaves. 



Neither Nativelle's nor Homolle's digitalin form a com- 

 plete substitute for digitalis, and their use is not recom- 

 mended. Schmiedeberg's digitalin* is, however, said to be 

 the best substitute, by eminent authority. 



Incompatibility. — Digitalis is incompatible with tannic 

 acid, lead acetate, cinchona and ferric salts. 



Digitalis Folia Dose. — H., gr.x.-3i. (.6-.4); C, 3 ss.-i.ss. 

 (2.-6.); Sh. & Sw., gr.v.-xv. (.3-1.); D., gr.ss.-iii. (.03-.2). 



PREPARATIONS. 



Extractum Digitalis. Extract of Digitalis. (U. S, P.) 

 Made by maceration and percolation with alcohol and water; dis- 

 tillation of the alcohol and evaporation to pilular consistence. 

 Dose.— H. & C, gr.v.-xx. (.3-1.3); D., gr.i-1. (.008-.06). 



Fluidextr actum Digitalis. Fluidextract of Digitalis. (TJ. S. P.) 

 Made by maceration and percolation with alcohol and water, and 



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



Dose.— H., nx.- 3 i. (.6-4.); C, 3 ss.-i.ss. (2.-6.); Sh. & Sw., mv.-xv. 



(..3-1.); D., mss.-iii. (.03-.2). 



Tinctura Digitalis. Tincture of Digitalis. (U. S. & B. P.) 

 Made by maceration and percolation of powdered digitalis (100), 



with sufficicient alcohol and water to make 1,000. (U. S. P.) 



Dose.— H. & C, 3ii.-vi. (8.-34.); Sh. &Sw., "ixxx.- 3 i.ss. (2.-6.); 



D., nv.-xxx. (.3-3.). 



Infusum Digitalis. Infusion of Digitalis. (U. S. & B. P.) 



Digitalis, 15; alcohol, 100; cinnamon water, 1.50; boiling water, 



500 ; cold water to make 1,000. By maceration. (U. S. P.) 



* This preparation la the Digitalin " German " of Merck, and may he given in 

 the same doses as Homolle's digitalin. No one glucoslde of digitalis represents the 

 action of the whole drug, as obtained hy use of the tincture or fluidextract 



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