I haven't done any drugs for almost 4 years, besides drink. Occasionally I'll have a bit of spirits to relax the nerves, but for the most part I'm such a perfectionist that I can't imagine doing tunes chemically-altered. About 90% of what I work on never gets finished or put out because I think it sounds like crap when I listen later, so I'd think it would be even worse writing stuff while you're off your rocker. Just the way I see it though, probably works well for some people.