Its an interesting point - well known high performers in many walks of life are documented drug users. To add to the list above, here are two more that im familiar with:<p>Stephen King has trouble recalling writing a number of his books during the eighties due to alcohol and cocaine abuse. [1]<p>Sigmund Freud was a cocaine abuser up until the point he started to become a more noted researcher [2]<p>[1] <a href="http:&#x2F;&#x2F;www.dailymail.co.uk&#x2F;tvshowbiz&#x2F;article-1178151&#x2F;Stephen-Kings-Real-Horror-Story-How-novelists-addiction-drink-drugs-nearly-killed-him.html" rel="nofollow">http:&#x2F;&#x2F;www.dailymail.co.uk&#x2F;tvshowbiz&#x2F;article-1178151&#x2F;Stephen...</a><p>[2] <a href="http:&#x2F;&#x2F;www.nytimes.com&#x2F;2011&#x2F;07&#x2F;24&#x2F;books&#x2F;review&#x2F;an-anatomy-of-addiction-by-howard-markel-book-review.html?_r=0" rel="nofollow">http:&#x2F;&#x2F;www.nytimes.com&#x2F;2011&#x2F;07&#x2F;24&#x2F;books&#x2F;review&#x2F;an-anatomy-of...</a>