DOSE CALCULATIONS /PTCB/NAPLEX /PC EXAMS PREPARATION

PHARMACEUTICS/PHARMACEUTICAL CALCULATIONS

1. PRE-REG EXAM DOSE
CALCULATION DOSSIER PART 2
PREPARED BY PHILIPO RAPHAEL

2. QUESTION 1
RESTASIS Ophthalmic Emulsion contains 0.05% w/v cyclosporin. If a
dose of one drop measures 28 µL, how many micrograms of
cyclosporinare present?

3. SOLUTION 1

4. QUESTION 2
The oral dose of a drug is 2.5 mg. If a solution contains 0.5% w/v of the
drug in a dropper bottle that delivers 12 drops/mL, how many drops
would supply the dose?

5. SOLUTION 2

6. QUESTION 3
MYLICON drops contain 2 g of simethiconein a 30-mL container .How
many milligrams of the drug are contained in each 0.6-mL dose?

7. SOLUTION 3

8. QUESTION 4
Ciprofloxacin (CIPRO) oral suspension contains 250 mg of ciprofloxacin
per 5ml. A physician prescribed 125 mg of ciprofloxacin q.i.d.×10 days.
a)How many doses are needed?
b)How many milliliters should be given per dose?
c)How many milliliters of ciprofloxacin oralsuspensioncontaining 250
mg per 5 ml should be dispensed?

9. SOLUTION 4

10. QUESTION 5
If a liquid medicine is to be taken three times daily, and if 180 mL are to
be taken in 4 days, how many tablespoonful should be prescribed for
each dose?

11. SOLUTION 5

12. QUESTION 6
If a VENTOLIN inhaler contains 20 mg of albuterol, how many
inhalation-doses can be delivered if each inhalation-dose contains 90
µg?

13. SOLUTION 6

14. QUESTION 7
The recommended maintenance dose of BECLOVENT (beclomethasone
diproprionate) an aerosolized inhalant, is 100µg administered twice
daily . The commercial inhaler delivers 50 mcg per metered inhalation
and contains 200 inhalations. How many inhalers should be dispensed
to a patient if a 60-day supply is prescribed?

15. SOLUTION 7

16. QUESTION 8
A transdermal patch contains 5 mg of fentanyl and has a drug-release
rate of 50 mcg/ hour. The patch is worn for 72 hours. Calculate
a)the milligrams of fentanyl delivered daily
b)the milligrams of fentanyl remaining in the patch when it is
removed
c)the percentage of drug remaining in the patch when it is removed.

17. SOLUTION 8

18. QUESTION 9
A patient has been instructed to take 15 mL of alumina and magnesium
oral suspension every other hour for four doses How many days will
two 12-fl-oz. bottles of the suspension last?

19. SOLUTION 9

20. QUESTION 10
If a cough syrup contains 0.18 g of dextromethorphan HBrin 120 mL,
how many milligrams of the drug are contained in each teaspoonful
dose?

21. SOLUTION 10