65 



EXTRACTA— EXTRACTS 



Extracts are solid or semi-solid preparations of the active con- 

 stituents of drugs prepared by the percolation of the crude drug 

 with the proper menstruum and evaporation of the percolate. The 

 menstruum may be water, alcohol, or various proportions of water 

 and alcohol, or ammonia and extracts made from such a percolate 

 are termed respectively, aqueous, alcoholic, hydro-alcoholic, or am- 

 moniated extracts. Besides the above the juices of fresh plants, ex- 

 tracted by contusion and expression are often evaporated and known 

 as "inspissated juices". These are popular in England but none 

 are otReial in this country. There are 25 official extracts. As a rule 

 the extracts are not so satisfactory as the fluidextracts or tinctures 

 because they vary in strength, the dose is exceedingly small and the 

 soft ones are difficult to manipulate. 



Table op Extracts 



Extractum Aconiti 



" Belladonnae Foliorum 

 Cannabis 

 Cascarae 

 Cimicifugae 

 Colchici Cormi 

 ('olocynthidis 

 Colocynthidis com- 



positum 

 Ergotae 

 Pellis Bovis 

 Gelsemii 

 Gentianae 

 Glycyrrhizae 

 Glycyrrhizae Purum 

 Hydrastis 

 Hyoscyami 

 Malti 



Nucis Vomicae 

 Opii 



Physostigmatis 

 Rhei 



Stramonii 

 Sumbul 

 Taraxaci 

 Viburni Prunifolii 



Powdered 



Powdered and Pilular 



Pilular 



Powdered 



Powdered 



Powdered 



Powdered 



Powdered 



Pilular 



Powdered 



Powdered 



Pilular 



Brittle 



Pilular 



Powdered 



Pilular 



Thin Liquid 



Powdered 



Powdered 



Powdered 



Powdered 



Powdered and Pilular 



Pilular 



Pilular 



Powdered 



