💊 PCAT Exam Prep

Drug half-life determines:

A Drug potency only
B The time for plasma drug concentration to decrease by 50%, influencing dosing intervals
C Drug efficacy
D Route of administration

✓ Correct Answer: Option B

t½ = 0.693/k. After 5 half-lives, >96% eliminated. Steady state reached after ~5 half-lives of continuous dosing.

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