CN Pharmacology & Drug Administration 3

Question 1

Metformin, a common diabetes drug, may deplete which vitamin over long-term use?

Accepted Answer

Vitamin B12

Answer

Long-term metformin use impairs B12 absorption, risking deficiency.

Question 2

Which term refers to the effect a drug has on the body and its mechanism of action?

Accepted Answer

Pharmacodynamics

Answer

Pharmacodynamics describes what the drug does to the body.

Question 3

Proton pump inhibitors (PPIs) can reduce absorption of which mineral due to lowered stomach acid?

Accepted Answer

Both magnesium and iron

Answer

Reduced gastric acid from PPIs impairs absorption of both iron and magnesium.

Question 4

A drug's 'half-life' refers to the time required for what?

Accepted Answer

Plasma concentration to fall by half

Answer

Half-life is the time for plasma drug concentration to decrease by 50%.

Question 5

MAOI antidepressants require avoiding foods high in which compound to prevent hypertensive crisis?

Accepted Answer

Tyramine

Answer

MAOIs block tyramine breakdown, and tyramine-rich foods can spike blood pressure.

(CN) Certified Nutritionist Practice Test