104 PRESCRIPTION WRITING 



Translated : Mix, and let there be made powder 1 ; dis- 

 pense powders such vi. 



(Abbreviated) M. et f . pulv. 1; dispense pulv. tales vi. 



Sig. Give one powder every tvro hours. 



John Smith. 



In the second case, if we write a prescription for six 

 powders, we multiply the dose of the ingredients in each 

 powder by 6, and then order the prescription to be dispensed 

 in six papers. 



Hydrarg. chlorid. mitis gr.xii. 



Santonin gr. vi. 



■ Sacch. lactis 3 i. 



Misce et divide inchartulas numero..vi. 



Translated : Mix and divide into papers in number vi. 

 (Abbreviated) M. etdiv. in ch't. No. vi. 

 Sig. (as before) . 



To write the above in the metric system. The dose of 

 calomel is gr.ii. = .12 gm. .12 X 6 = .72, or gr.xii. The dose 

 of santonin is gr.i. = .06 gm. .06 x 6 = .36 gm., or gr.vi. 

 The amount of sugar of milk used as an excipient in each 

 powder is gr.x. .06 X 10 = .6 gm., the amount prescribed in 

 each powder. The amount necessary for six powders is 

 .6x6 = 3.6 gm., approximately 4 gm. 



Solids in Gm. Liquids in Cc. 



Hydrarg. chlorid. mitis I 72 



Santonin (36 



Sach. lactis 4 



M. et div. ch't. in No .vi. 



Sig. (as before). 



We will write a prescription for a horse, in the form of 

 a powder, containing dried iron sulphate, nux vomica and 

 sodium bicarbonate. The Latin for iron sulphate (dried) is 

 ferrum, genitive ferr-i, of iron ; svlphas^ genitive sulphat-is, 

 of sulphate ; exsiccatus, genitive exsiccat-i, of dried ; dose, 

 3 i. The Latin for nux vomica is nux, genitive ntic-is, of 

 nut; vomica, genitive vomic-ce, of vomica; dose, 3i. The 



