7.8 g aspirin
151 milliliters (or 151.47 ml)
*See paragraph 1-41b(7).
Section VII. REDUCTION AND ENLARGEMENT OF FORMULAS
Most of the preparations made in a pharmacy are from proven formulas that have
been tested and are listed in the United States Pharmacopeia/National Formulary
(USP/NF) as official formulas. These formulas list the amount of each ingredient
needed to make a certain amount of the preparation. At times, it is necessary to reduce
or enlarge a formula to satisfy the needs of your pharmacy.
IF Amount of each ingredient = THEN *Amount of each
in the official formula____
Total quantity of the
*NOTE: Most of the time, the unknown factor will be the "Amount of each ingredient
b. Sample Problem: Using the official formula below, calculate the amount of
each ingredient needed to make 240 ml of Peppermint Spirit.
Peppermint Oil............ 100 ml
Peppermint Powder.........10 g
Alcohol.....qsad.......... 1000 ml