PRESCBIPTION WRITING 103 



dose, 5 i. The Latin for chloroform is chloroformum, geni- 

 tive clilowform-i, of chloroform ; dose, 3 ii- The Latin for 

 laudanum is tinctura opii ; tinctura^ genitive tinctur-cey of 

 tincture ; opiums genitive opi-i, of opium ; dose, § ii. The 

 prescription reads : 



^theris ^i. 



Chloroformi 3 ii. 



Tincturae opii 3 ii. 



Misce et fiat haustus. 



Translated : (Misce) mix, (et) and (fiat) let there be 

 made (haustus) a drench. 



(Abbreviated) M. et f . haust. 



Sig. Give at once in one dose in pint of water. 



John Smith. 



In writing a prescription for powders, we may either 

 write for one powder and direct the druggist to dispense 

 several more like it, or write for the whole amount of the 

 ingredients and order them divided into the required num- 

 ber of doses or papers. In the first case we will write for a 

 powder containing one dose of each of the drugs. 



For example, we may write a prescription for calomel 

 and santonin, with sugar of milk as an excipient, since the 

 dose of the drug is inconveniently small. This powder is 

 suitable for a medium-sized dog. 



The Latin for calomel, or the lower chloride of mercury, 

 is hydrargyrum^ genitive hydrargyr-i, of mercury ; chlori- 

 dum, genitive cliiorid-i, of chloride ; mite, genitive mit-is, of 

 lower ; dose, gr.ii. The Latin for santonin is santoninurriy 

 genitive santonin-iy of santonin ; dose, gr.i. The Latin for 

 sugar of milk is saccharurriy genitive sacchar-iy of sugar ; lac, 

 genitive lac-tis, of milk ; amount, gr.x. The prescription will 

 read : 



9 



Hydrargyri chloridi mitis gr.ii. 



Santonini gr.i. 



Sacchari lactis gr.x. 



Misce et fiat pulvis 1 ; dispense pulveres tales vi» 



