LIQUID PRESCRIPTIONS 69 



WORDS OE PHRASES CONTRACTIONS ENG. EQUIVALENTS 



Talis Tal Such a one. 



Ter Ter Thrice, or three times. 



Ter m die, or Ter die T. i. d. or T. D. .Thrice daily. 



Tero Tero I rub. 



Tere simul Tere sim Eub together. 



Tertius Tert Third. 



Tres Tres Three. 



Triduum Trid Three days. 



Tritura Trit Triturate. 



Troschiscus, Trochisin Troch A lozenge or troche. 



Tussis Tus A cough. 



Ultimo (or Ultima) 



priBscriptus Ult. prresc The last ordered. 



Una Una Together. 



Uncia Unc. or S An ounce. 



Ut dictum Ut diet As directed. 



Vehiculum Vehic A vehicle or menstruum. 



Vel Vel Or. 



Vesper, -eris Vesp The evening. 



Vinum Vin Wine. 



Vitellus Vitel Yolk. 



Vitreum, Vitrum Vitr Glass. 



Volatilis, -is. Volatile Volat Volatile. 



LIQUID PRESCRIPTIONS 



Liquid medicines intended for internal use only are always 

 administered by measure, hence it is customary to make the total 

 quantity of the prescription such that each dose will be a teaspoonful, 

 dessertspoonful, tablespoonful (§ss), one ounce, two ounces, etc., 

 without regard to the quantity of drugs present. The difference 

 between the actual dose of the active ingredients and the actual dose 

 of the mixture is made up by the vehicle. For this reason the 

 vehicle is therefore varied to make the total number of easily meas- 

 ured doses desired. Thus we say relative to amount of vehicle 

 desired: q.s. ad '^ij-^y, etc., or as much as may be needed to 

 make the amount decided upon, without any regard to the amount 

 of drugs present. 



The reason for this custom will be readily seen from the follow- 

 ing prescription. Suppose we Vish to give 1 dram of fluidextract 

 of Nux Vomica at each dose together with four drams of Fowler's 

 Solution, in all 16 doses. Then we would have: 



5^ Fluidextracti ISTueia Vomicae S ij 



Liquoris Potassi Arsenitis 3 viij 



Aquse q. s ad. 3 xvj 



M. et Sig. 



2 Tablespoonfuls. T. L D. 



This prescription then calls for 16 ounce doses each containing 1 

 dram of Fluidextract of Nux Vomica and half ounce doses of Fow- 

 ler's Solution, while if it should be written : 



