With respect to drug effects, "efficacy" means the tendency of a drug to ____.
A) have inhibitory effects
B) have excitatory effects
C) attach to a receptor
D) activate a receptor

Question

Quizplus · Accepted Answer

Efficacy refers to the ability of a drug to activate the receptor it is targeting. It does not necessarily imply that the drug will have excitatory effects, as some drugs may act as inhibitors even if they have high efficacy. Therefore, option A and B are incorrect. Option C is also incorrect as attaching to a receptor alone does not necessarily indicate efficacy.

With Respect to Drug Effects, "Efficacy" Means the Tendency of a Drug