Question

directions: you are to read each problem carefully and answer what the question is asking you to do. please show your work in the space provided below, circle your answer. you have thirty minutes for 20 questions.

1. order: prednisone 30 mg po

tablets available: 10 mg. how many tablets?

1. order: digoxin 0.25 mg po

tablets available: 0.125 mg. how many tablets?

1. order: amoxicillin 500 mg po

available: 250 mg/5 ml. how many ml?

1. order: diphenhydramine 25 mg po

available: 12.5 mg/5 ml. how many ml?

1. order: phenytoin 200 mg po

available: 125 mg/5 ml. how many ml?

1. order: calcium liquid 600 mg po

available: 300 mg/5 ml. how many ml?

Explanation:

Step1: Calculate prednisone tablets

$\text{Number of tablets} = \frac{\text{Ordered dose}}{\text{Dose per tablet}} = \frac{30\ \text{mg}}{10\ \text{mg}} = 3$

Step2: Calculate digoxin tablets

$\text{Number of tablets} = \frac{\text{Ordered dose}}{\text{Dose per tablet}} = \frac{0.25\ \text{mg}}{0.125\ \text{mg}} = 2$

Step3: Calculate amoxicillin volume

$\text{Volume (mL)} = \frac{\text{Ordered dose}}{\text{Dose per volume}} \times 5\ \text{mL} = \frac{500\ \text{mg}}{250\ \text{mg}} \times 5\ \text{mL} = 10\ \text{mL}$

Step4: Calculate diphenhydramine volume

$\text{Volume (mL)} = \frac{\text{Ordered dose}}{\text{Dose per volume}} \times 5\ \text{mL} = \frac{25\ \text{mg}}{12.5\ \text{mg}} \times 5\ \text{mL} = 10\ \text{mL}$

Step5: Calculate phenytoin volume

$\text{Volume (mL)} = \frac{\text{Ordered dose}}{\text{Dose per volume}} \times 5\ \text{mL} = \frac{200\ \text{mg}}{125\ \text{mg}} \times 5\ \text{mL} = 8\ \text{mL}$

Step6: Calculate calcium liquid volume

$\text{Volume (mL)} = \frac{\text{Ordered dose}}{\text{Dose per volume}} \times 5\ \text{mL} = \frac{600\ \text{mg}}{300\ \text{mg}} \times 5\ \text{mL} = 10\ \text{mL}$

Answer:

1. 3 tablets
2. 2 tablets
3. 10 mL
4. 10 mL
5. 8 mL
6. 10 mL