(16)

6.6 ml

(17)

7.8 g aspirin

4.68g lactose

(18)

151 milliliters (or 151.47 ml)

*See paragraph 1-41b(7).

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.

a.

The formula:

IF Amount of each ingredient = THEN *Amount of each

in the official formula____

Ingredient needed_

Total quantity of the

Total quantity

official formula

desired

needed."

b. Sample Problem: Using the official formula below, calculate the amount of

each ingredient needed to make 240 ml of Peppermint Spirit.

Peppermint Spirit

Peppermint Oil............ 100 ml

Peppermint Powder.........10 g

Alcohol.....qsad.......... 1000 ml

MD0802

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