MATERIA MEDICA AND THERAPEUTICS. 39 



11. Never mix Glucosides as Santonin, Colocythin, etc., 

 with free acids, or with a substance containing emulsin, as these 

 agents will decompose it. 



12. Corrosive sublimate is incompatible with almost every- 

 thing, even compound Syrup of Sarsaparilla is said to decom- 

 pose it. 



13. Iodide of potash decomposes most of the metallic salts ; 

 it is best administered alone. 



14. Nitrate of silver, Acetate and the Subacetate of Lead 

 are incompatible with almost everything, but may be combined 

 with opium, which though chemically incompatible, is therapeu- 

 tically active as an astringent and anodyne. 



15. Tannic Acid and Gallic Acid and substances containing 

 them, as the astringent bitters, precipitate albumen, alkaloids and 

 most soluble metallic salts. 



16. Iodine and the soluble iodides are incompatible with 

 the alkaloids and substances containing them, also with most 

 metallic salts. 



17. Poisonous compounds may be formed by mixing iodide 

 of potash or syrup of iodide of iron with chlorate of potash. 



Potassium cyanide or Dilute Hydrocyanic Acid, with Calo- 

 mel, Bismuth salts, Metallic Hydrates, Carbonates, subnitrates or 

 subchlorides, form the poisonous cyanides. Never combine Hy- 

 drochloric Acid and Calomel as Corrosive Sublimate will be 

 formed. 



18. Explosive compounds result from mixing powerful oxi- 

 dizing agents with others which are readily oxidized. 



Chief are as follows: 

 Oxidizers. — Nitric and Chromic Acids, Hydrochloric Acid, 

 Nitro-hydrochloric Acid, Potassium Chlorate, Potassium Per- 

 manganate, iodates, nitrates, bichromates, and chlorates. 



Oxidizable or Combustible. — Glycerin, Sugar, Alcohols, Oils, 

 Charcoal, Ethers, Sulphur and Sulphites, dry organic substances, 

 Phosphorus, Iodine and Turpentine. Nitrate of Silver and Creo- 

 sote when mixed explode, also potassium chlorate and tannic or 

 gallic acids, bromine and alcohol, alcohol and muriate of ammonia. 



19. Resinous Tinctures or Fluid Extracts are phar- 

 maceutically incompatible with aqueous solutions, they are thrown 

 out of solution. 



