I don't think it is so much the drugs themselves, but the manner in which they're being doled out.
I recommend Harpers Magazine's review of DSM-IV: it's a great read:
"Not content with the merely weird, the DSM-IV also attempts to claim dominion over the mundane. Current among the many symptoms of the deranged mind are bad writing (315.2. and its associated symptom, poor handwriting); coffee drinking, including coffee nerves (305.90), bad coffee nerves (292.89), inability to sleep after drinking too much coffee (292.89), and something that probably has something to do with coffee, though the therapist can’t put his finger on it (292.9); shyness (299.80, also known as Asperger’s Disorder); sleepwalking (307.46); jet lag (307.45); snobbery (301. 7, a subset of Antisocial Personality Disorder); and insomnia (307.42); to say nothing of tobacco smoking, which includes both getting hooked (305.10) and going cold turkey (292.0). You were out of your mind the last time you had a nightmare (307.4 7). Clumsiness is now a mental illness (315.4). So is playing video games (Malingering, V65.2). So is doing just about anything “vigorously.” So, under certain circumstances, is falling asleep at night."http://www.harpers.org/archive/1997/02/0008270