I'm not american, lived and visited several parts of the world. Love to talk and fit in with the locals and socialize.
Of course it's all anecdotal, but I'm pretty sure that something odd is going on in American culture. The times i've been there I couldn't help but finding amazing how such large parts of the population take behavioral related medication. I mean, even most TV commercials I saw were for anti depressants, or even complenents to them.
But it's not the medication itself what caught my attention but how people itself claims to be unwell, not feeling like what people should feel or not behaving as people should behave. It's as if there was some sort of strong "need to be normal" or "need to be well" (whathever tha means), and that not being like that is not fitting in society.
It's not that where I am from (South America) people won't get depressed or have panic attacks, but you see such symptoms by far much, much less often. It's not misdiagnose either or that people chooses to put up with it instead of taking medication , I mean, it's very clear when someone is going through depression. In contrast, people here are more "unpolite", intimate,cares less about rules and socialize a lot more. I'm sure there has to be a relationship somehow, but I am no expert on the matter. As I said, it's just what I see, but I can't connect the dots.
So, I think that even if pharmaceutical companies capitalize on this stuff, I'm not that sure they created the situation, I believe it's more akin to a side-effect.
Being a depressed person and having to take medication, I find that my life is way better taking the anti-depression meds then not. Of course, it took 10 or so years to find the meds that work best for me and i've spent most my life not on them, but in the last 5 or so years I've been the most mentally level I have ever been in my life.
Sure, drug companies make money by selling drugs and they want to sell as much drugs as they can, if needed or not. But that doesn't change the fact that most of the drugs they sell do have problems they address & help.
I also have ADHD, which didn't get diagnosed until later in my life (also), and no one seemed to care growing up. But I'm not really down with taking speed for it, and really giving speed to kids is really stupid. I mean, they made laws against selling drugs around schools, yet they prescribed them a class a speed that is way better then any meth they could get.
Stuff like this is why there is no such things as a "free market" and why there needs to regulations. Mainly drug reps paying doctors to prescribe their drugs.