Right, they _are_ overprescribed. They still have their uses though. One example:
I am getting an anti-depressant along with my pain medication. If I wasn't taking the anti-depressant (which also raises the pain tolerance level), I would need to take more than twice as much pain medication (tramadolhydrochloride in my case). I would sure like to skip both drugs, but realistically, I can't. I am not suffering from depression though, and never have. But to be honest: I sure would, if I were to stay at my current tramadol dose and had to leave out the anti-depressant. But that would simply be a pain-induced depression.

Anyway: Anti-depressants are prescribed way too often. Just like antibiotics. But the latter are certainly a bigger problem.

cu,
sven