WUTGALL 589 



owes its activity partly to the presence of bile, which seems 

 to be a solvent for it. It is probable that the intestinal secre- 

 tions are somewhat augmented. The ftecal movements, after 

 medicinal doses of podophyllin, are liquid, often stained with 

 bile, and may be accompanied by some nausea and griping. 

 Since podophyllin is an uncertain purgative, affecting differ- 

 ent patients unequally, it should be combined with other 

 agents when a purgative action is desired; preferably calo- 

 mel and aloes. The time required for the action of these 

 drugs is nearly the same as that necessary for podophyllin. 

 Podophyllin has heretofore been regarded as essentially 

 a cholagogue, but there is no sufficient evidence to warrant 

 this assumption. 



Administration. — Podophyllin should be given to dogs 

 in pills; to horses in ball with calomel and aloes, if purga- 

 tion is desired; or dissolved in liquor potassse and diluted 

 with water. 



Uses. — Podophyllin, clinically, appears to be particu- 

 larly useful in chronic constipation associated with jaundice 

 and hepatic disorders. The result of its action is said to be 

 more favorable when the fsecal discharges are dark colored, 

 whereas calomel is more successful if the evacuations are of 

 a light hue. 



SECTION" XII.— TANmO ACID AND DEUGS 



coNTAiisriJsrG it. 



Galla. Nutgall. (U. S. & B. P.) 



Synonym.— Galh, E. ; gallse, P. G. ; noix de galle, galle 

 de chene, Er. ; gallafel, G. 



An excresence on Quercus lusitanica Lamarck (nat. ord. 

 Cupuliferffi), caused by the punctures and deposited ova of 



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