79 

 Cataplasma Kaolini or Cataplasma of Kaolin 



Heat the kaolin in a suitable vessel at 100°C., with occasional 

 stirring, for one hour, mix it intimately with the boric acid, and 

 then incorporate the mixture thoroughly with the glycerin ; finally 

 add the thymol, which has been dissolved in the methyl salicylate 

 and the oil of peppermint, and make a homogeneous mass. It should 

 be kept in an air tight container. 



Remarks : — This preparation is similar to various proprietary 

 preparations which are often prescribed for applications to a large 

 number of inflammatory conditions. 



EMPLASTRA— PLASTERS 



Plasters are solid preparations containing medicinal substances 

 intended to be applied to the skin, and of sufficient adhesiveness to 

 adhere firmly. They differ from cerates in being free from fats 

 and also from the fact that cerates, when spread on cloth and ap- 

 plied are not of sufficient adhesiveness to stick firmly to the skin. 

 The bases of plasters consist of gum resins, lead plaster, resin 

 plaster, burgundy pitch, isinglass, and India rubber. In former 

 times the first named bases were often used, but the machine made 

 plasters with a rubber base have largely replaced them. 



The following are official : 



Emplastrum Belladonnae — Belladonna Plaster 



" Cantharidis Cantharides Plaster 



" Capsici Capsicum Plaster 



" Elasticum Rubber Plaster 



' ' Plumbi Lead Plaster 



" Resinae Resin or Rosin Plaster 



" Sinipis Mustard Plaster 



