22 VETERINARY MATERIA MEDICA. 



Hepatic Depressants decrease the functional ac- 

 tivity of the liver. Its various functions are acted 

 upon by different drugs : Bile production decreased 

 by opium, quinine, alcohol, and lead. Glycogen pro- 

 duction decreased by opium, phosphorus, and arsenic. 

 Urea decreased by opium, morphine, colchicum, alco- 

 hol, and quinine. 



Anthelmintics are agents which destroy (vermi- 

 cides) or expel (vermifuges) vs^orms inhabiting the in- 

 testinal canal. These are classed according to the 

 particular worm they are most efficient against; 

 thus: 



Thread-worm : Enemata of alum, sulphate of iron, 

 lime water. 



Round-worm : Santonin, areca nut, chenopodium, 

 sulphate of copper, etc., internally, combined with a 

 purgative. 



Strongylus micrurus (of sheep) : Injections of tur- 

 pentine intra tracheally. 



Tape-worm: Filix mas, kamala, kousso, grana- 

 tum, turpentine, and chloroform. 



Agents Affecting Metabolism. 



Restoratives are agents which promote construc- 

 tive metamorphosis. They may be subdivided into 

 foods, h£ematics, and tonics; many stimulants are also 

 classed as restoratives. 



Foods supply material to maintain the vital proc- 

 esses or to renew some structure of the body. 



Hcematics enrich the quality of the blood by in- 



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