Luis, a nursing student, is explaining to his patient the mechanism of action of selective serotonin reuptake inhibitors (SSRIs). What should he include?

Choice A reason: SSRIs do not increase norepinephrine levels; that is the action of SNRIs or other antidepressant classes. Choice B reason: SSRIs do not inhibit serotonin production; instead, they work by blocking reuptake, leading to increased serotonin availability. Choice C reason: SSRIs do not lower dopamine levels; this would worsen mood symptoms rather than improve them. Choice D reason: SSRIs block serotonin reuptake in presynaptic neurons, which increases serotonin availability in the synaptic cleft and helps elevate mood.