SENEGA 



28l 



which is a mixture of valerianic ether and methyl salicylate, resin, 

 malic acid, and sugar. Liquid preparations of senega are apt to be- 

 come gelatinous, which is ascribed to the presence of pectin com- 

 pounds; but is very likely, at least in part, due to sapogenin, generated 

 under the influence of acids or other compounds; the jelly is rendered 



FIG. 159. Polygala senega Plant and rhizome. 



soluble again on the addition of an alkali. The above proximate 

 principles are similar to the saponins. Ash, not exceeding 5 per cent. 

 ACTION AND USES. A valuable stimulating expectorant, for which it is 

 generally used; also diuretic, and in large doses emetic and cathartic. 

 It affects the heart like digitalis. Dose: 10 to 30 gr. (0.6 to 2 Gm.). 



OFFICIAL PREPARATIONS. 



Fluidextractum Senegae, Dose: 10 to 30 TTJJ (0.6 to 2 mils). 



Syrupus Seaegse(2o per cent, of fl'ext.), 30 to 60 itjj (2 to 4 mils). 



