Duration Of Therapy - Pharmacy Technician Certification Exam Ptce

1. State the common drop conversion used for ophthalmic solutions on exams.

   $1\text{ mL}=20\text{ drops}$. Uses the standard approximation for calculating days supply in ophthalmic drop formulations.

2. What is the days supply for Qty 240 mL with directions: take 10 mL twice daily?

   $12$ days. Divides total volume by daily usage of 20 mL to find the supply duration.

3. What is the duration of therapy for directions: take 1 tablet twice daily for 10 days?

   $10$ days. Reflects the explicitly stated period in the directions for the course of treatment.

4. What is the days supply for Qty 100 insulin units with directions: inject 10 units daily?

   $10$ days. Divides total insulin units dispensed by daily dosage to find the supply duration.

5. What is the days supply for Qty 120 with directions: take 2 tablets daily?

   $60$ days. Divides total quantity by daily usage of 2 tablets to find the supply duration.

6. State the formula to find total insulin units in a vial when concentration is units per mL.

   Total units $=\text{mL}\times\text{units/mL}$. Multiplies vial volume by concentration to determine total available insulin units.

7. What is the days supply for Qty 24 with directions: take 2 tablets every 6 hours?

   $3$ days. Divides total quantity by daily usage of 8 tablets, based on 2 tablets every 6 hours equaling 4 doses per day.

8. What is the days supply for Qty 30 patches with directions: apply 1 patch every 72 hours?

   $90$ days. Multiplies quantity by the duration each patch covers (72 hours equals 3 days) to find total supply duration.

9. What is the days supply for Qty 15 mL with directions: take 5 mL three times daily?

   $1$ day. Divides total volume by daily usage of 15 mL to find the supply duration.

10. What is the days supply for Qty 8 patches with directions: apply 1 patch weekly?

    $56$ days. Multiplies quantity by the duration each patch covers (1 week equals 7 days) to find total supply duration.

11. What is the days supply for a 10 mL insulin vial labeled $100\ \text{units/mL}$ at 20 units daily?

    $50$ days (total $1000$ units). Divides total units in the vial by daily dosage to find the supply duration.

12. State the formula for days supply when directions give a fixed number of dosage units per day.

    Days supply $=\frac{\text{quantity dispensed}}{\text{units per day}}$. Divides the total quantity dispensed by the number of units taken daily to determine how many days the medication will last.

13. State the formula for inhaler days supply using total actuations and puffs per day.

    Days supply $=\frac{\text{total actuations}}{\text{puffs per day}}$. Divides total labeled actuations by the number of puffs used per day to determine supply duration.

14. Identify the days supply for Qty 1 inhaler labeled 200 actuations: inhale 2 puffs four times daily.

    $25$ days. Divides total actuations by daily puffs (2 puffs four times daily equals 8) to find the supply duration.

15. What is the days supply for Qty 60 with directions: take 1 tablet twice daily?

    $30$ days. Divides total quantity by daily usage of 2 tablets to find the supply duration.

16. What quantity is needed for 30 days if directions are: take 2 tablets three times daily?

    $180$ tablets. Multiplies daily usage (2 tablets three times equals 6) by the number of days to find total quantity needed.

17. What is the days supply for Qty 100 mL with directions: take 2.5 mL daily?

    $40$ days. Divides total volume by daily usage of 2.5 mL to find the supply duration.

18. What is the days supply for Qty 90 with directions: take 1 tablet daily?

    $90$ days. Divides total quantity by daily usage of 1 tablet to find the supply duration.

19. What is the days supply for Qty 45 with directions: take 1 tablet three times daily?

    $15$ days. Divides total quantity by daily usage of 3 tablets to find the supply duration.

20. What is the days supply for Qty 75 with directions: take 1 tablet every 6 hours?

    $18.75$ days. Divides total quantity by daily usage of 4 tablets, based on every 6 hours equaling 4 doses per day.

21. What is the days supply for a 10 mL eye drop bottle: 1 drop in each eye twice daily?

    $50$ days (assumes $20$ drops/mL). Divides total drops (volume times 20 drops per mL) by daily usage of 4 drops, based on 1 drop each eye twice daily.

22. State the conversion used to change "every $x$ hours" directions into doses per day.

    Doses/day $=\frac{24}{x}$. Converts the interval in hours to daily doses by dividing 24 hours by the dosing interval.

23. What is the days supply for Qty 28 with directions: take 1 capsule every 12 hours?

    $14$ days. Divides total quantity by daily usage of 2 capsules, based on every 12 hours equaling 2 doses per day.

24. What is the days supply for Qty 21 with directions: take 1 tablet every 8 hours?

    $7$ days. Divides total quantity by daily usage of 3 tablets, based on every 8 hours equaling 3 doses per day.

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