Some dumbass I taught doesn't understand how SSRIs work

He was a fellow for 3 years and we diagnosed over a hundred patients with depression and anxiety. We don't know how they help but at least know the pharmacokinetics. I don't know how they effect a patient, I'm no longer a doctor, go ask somebody that's actively practicing for the same answer. I should've dropped him when he fricked up a CML case for acute leukemia a decade ago