PTCB Drug Test #2 3

Question 1

A physician orders vancomycin 1 g IV every 12 hours. Available: vancomycin 500 mg/vial. How many vials are needed per day?

Accepted Answer

4 vials

Answer

1 g = 1000 mg. Each dose requires 1000 mg ÷ 500 mg = 2 vials. With 2 doses per day: 2 x 2 = 4 vials per day.

Question 2

Which of the following SSRIs has the longest half-life, making it less likely to cause discontinuation syndrome?

Accepted Answer

Fluoxetine

Answer

Fluoxetine has the longest half-life (~1–6 days for parent drug, ~4–16 days for active metabolite norfluoxetine), making discontinuation syndrome much less common than with other SSRIs.

Question 3

Which of the following is the brand name for lisdexamfetamine?

Accepted Answer

Vyvanse

Answer

Vyvanse is the brand name for lisdexamfetamine dimesylate, a prodrug Schedule II stimulant used for ADHD and binge eating disorder.

Question 4

What is the mechanism of action of ACE inhibitors?

Accepted Answer

Prevent conversion of angiotensin I to angiotensin II

Answer

ACE inhibitors block the angiotensin-converting enzyme, preventing the conversion of angiotensin I to angiotensin II, which lowers blood pressure and reduces aldosterone secretion.

Question 5

Which of the following is classified as a Schedule IV controlled substance?

Accepted Answer

Alprazolam

Answer

Alprazolam (Xanax) is a Schedule IV benzodiazepine. Buprenorphine is Schedule III, morphine is Schedule II, and methylphenidate is Schedule II.

Pharmacy Practice Test

Pharmacy Practice Test

PTCB Drug Test #2 3