Which brings us back to the imaginary scenario at the start of this post. My personal interpretation of results like those of Fournier et al is this: antidepressants treat classical clinical depression, of the kind that psychiatrists in 1960 would have recognized. This is the kind of depression that they were originally used for, after all, because the first antidepressants arrived in 1953, and modern antidepressants like Prozac target the same neurotransmitter systems.Yet in recent years “clinical depression” has become a much broader term. Many peopleattribute this to marketing on the part of pharmaceutical companies. Whatever the cause, it’s almost certain that many people are now being prescribed antidepressants for emotional and personal issues which wouldn’t have been considered medical illnesses until quite recently. Antidepressants also have a long history of use for other conditions, like OCD, but this is a separate issue.