Deck 14: Formula Method

Question 1

The solution available contains 1 g in 50 mL. Prepare a dose of 350 mg.

Answer 1

17.5 mL 1 g = 1000 mg × 50 mL = 17.5 mL

Question 2

A dosage of 65 units is ordered. The strength available is 100 units in 5 mL.

Answer 2

3.3 mL × 5 mL = 3.25 mL = 3.3 mL

Question 3

An order is given for 65 mcg. The available container is labeled 10 mg in 30 mL.

Answer 3

0.2 mL 10 mg = 10,000 mcg × 30 mL = 0.195 mL = 0.2 mL

Question 4

A dosage of 50 mEq has been ordered. The available container is labeled 90 mEq in 4 mL.

Question 5

An order is written to administer 400 mcg. The available dosage is 1 mg in 2 mL.

Question 6

Prepare a dose of 0.1
g. Available strength is 250 mg in 5 mL.

Question 7

The ordered dose is 175,000 units. The available strength is 500,000 units in 7.5 mL.

Question 8

The drug is labeled 50 mEq in 15 mL. Prepare a dose of 90 mEq.

Question 9

The strength available is 60 mEq in 6 mL. Prepare 15 mEq.

Question 10

Prepare a dose of 12 mg from an available supply of 10 mg in 5 mL.

Question 11

The available strength is 50 units in 10 mL. Prepare a dose of 630 units.

Question 12

The drug is labeled 80 mg in 4 mL. The order is for 120 mg.

Question 13

The label reads 20 mg in 50 mL. An 18 mg dose has been ordered.

Question 14

Draw up 14 units from a vial labeled 20 units in 5 mL.

Question 15

You have available 0.2 g in 2 mL. Draw up a dosage of 100 mg.

Question 16

The order is for 6 mg. The drug is labeled 20 mg in 25 mL.

Question 17

Prepare for IV use a dose of 75 mg from an available supply of 0.1 g in 5 mL.

Question 18

Prepare a 150 mg dose from an available dosage of 800 mg in 100 mL.

Question 19

Prepare a 3.4 mg dosage from an ampule labeled 10 mg in 10 mL.

Question 20

An order is written for an addition of 70 mEq to an IV solution. The available vial is labeled 40 mEq in 10 mL.

Question 21

You are to prepare 45 mEq for addition to an IV solution. The solution available is 10 mEq in 25 mL.

Question 22

The drug is labeled 10,000 units in 1 mL. The order is for 6000 units.

Question 23

Prepare a dose of 475 mg from an available supply of 0.3 g in 2 mL.

Question 24

165 mcg is ordered and you have 0.6 mg in 5 mL available.

Question 25

The dosage strength available is 2 g in 50 mL. Draw up a dose of 4.5
g.