For some reason, my doctor has emphasized, "caffeine is not an antidepressant!" This is because I think he believes in meds being the solution to my depression (he's right). I think it's largely also because caffeine is not a medicine, per se. So, while caffeine can be helpful short-term, I don't think it's a long-term solution to my problems. It does make me happy in the moment though (caffeine does). But that's also because I'm on my meds!