20% of Scientists Admit Using Brain-Enhancing Drugs

I read that statistic at the Onion... so I Googled it, and found this article,
which describes the results of this survey regarding the use of cognition-enhancing drugs.

Nature released the results of an online survey in which 20 percent of respondents, largely drawn from the scientific community, admitted to using brain-enhancing drugs like Ritalin (methylphenidate) and Provigil (modafinil). ... The 1,427-person survey was launched after a duo of articles this winter touched off a storm of questions about widespread neuroenhancer use by the scientific community.

I wonder what the results of a similar survey of the musical community would be?

Even Frank "straight edge" Zappa was a hardcore user of coffee and cigarettes.

I, and pretty much every scientist I know, regularly use the stimulant caffeine. Most are totally dependant on it.