Question

A pharmacy technician is compounding an order for 40 g of hydrocortisone ointment. it should be 2% hydrocortisone and 3% calamine. when the 40g order is complete how much of the solution will be the inactive solvent?
a. 2 g
b. 5 g
c. 38 g
d. 39.2 g

Answer 1

Answer:

When a pharmacy technician is preparing an order for 40 g of hydrocortisone ointment containing 2% hydrocortisone and 3% calamine, the amount of ointment that corresponds to the inactive solvent is 38 g.

Explanation:

If a pharmaceutical preparation of hydrocortisone ointment contains 2% hydrocortisone and 3% calamine, it will contain only 2 g of these active compounds in 40 g of preparation. This means that the amount of inert or inactive solvent is 38 g.

1. Hydrocortisone 2% + calamine 3% = 5%.

40 g ------------------ 100%

 X ------------------ 5%

Active components = (40 X 5) / 100 = 2g

2. Inactive solvent = Total amount - active components

Inactive solvent = 40 g - 2 g = 38 g

2% hydrocortisone ointment  composition

Hydrocortisone ........ 0,8 g

Calamine ................. 1,2 g

Inert excipient ..... 38 g

Total .........................  40 g