What's This? A Flash With A MESSAGE?!?
You know, I appreciate random, pointless crap just as much as any other Newgrounds visitor. But its nice to come across something every now and then which has a clear message behind it. Of course, this flash is far from a work of philosophy; but I really like the fact that you're drawing attention to a very real fact. Zoloft is marketing bullshit.
Aside from that, nice application. It was an iPod commerical, were iPod commericals created by Krinkles. Animation was fluid, fun to watch, colorful but didn't hurt my eyes. I find that with a lot of similar animation, I feel like the constant action and colors assualt my vision. A good example would be the "Say Something" music video. You managed to avoid that somehow, which is a wonderful thing.
My only suggestion would be to provide more tie-ins to your actual message. I get the point; this cute, balloon-chasing characters on TV are violently attacking each other, which is a much more accurate depiction of the drug. However, you describe the problem in your own explanation: if someone can watch this movie and think its all about violence, maybe you need to add some more clues or tie-ins in the actual flash to deter that. Just a thought.
Ultimately, though, a great flash. I give you a 5.