I can speak anecdotally and from a research perspective to these pieces as an educator: we know that incidents of pharmacation of youth in relation to Attention Defecit Disorded is extremely heavy on the eastern seaboard, starts to fade as you go west and us almost gone entirely when you hit the west coast so there is obviously something fishy going on here. An entertaining/sobering look at this can be found here In this great animation from RSA.org where a leading educational theorist outlines other impacts on youth that might be causing them to be socially inappropriate.
I also know that the average levels of anxiety among youth today are at a level right now that would've put kids in the 50's in a mental health environment. I believe technology and the changing nuclear family dynamic, consumerism etc. all play roles in this modern illness.
The common practice in the emergency ward us to treat high anxiety panic attack suicidal youth with heavy duty adult drugs indiscriminately. This often results in worse symptoms and kids without safety nets or supportive family structures get messed up severely as a consequence. But their tendency is more towards self-harm than outward violence. Most popular cases around pharmacation and violence tend to be with adults in the home taking their family out. I also see this pattern as a defect of patriarchy, not that women don't kill their kids, but men tend to do it with guns and they take out the whole family including themselves.
I agree with you that big pharma has a lot to answer for as they continue to experiment on the human masses to 'alter' our moods without care for future consequences - we'll just make another drug for that. It's a much more nightmarish version of what Philip K. Dick outlined in Do Androids Dream of Electric Sheep; it feels more like social breakdowns in THX1138. I think that movie better outlines how social control systems like drugs & religion, and in our age, consumerism, really mess with the thing we used to call being natural. A lot of kids I encounter who suffer from these 'modern diseases' are jittery & make me worried.