Scientists On Drugs: 11 Science & Tech Luminaries Who Used (PHOTOS)

You've probably heard that Sigmund Freud was a cocaine user. At the age of 28, he wrote his fiancee a letter in which he described himself as "a big wild man who has cocaine in his body," according to Freud scholar Dr. Paul Vitz. The future father of psychoanalysis added that he wanted to write "a song of praise to this magical substance."

But Freud was far from the only celebrated scientist to use sometimes illicit drugs. From Nobel Prize-winning chemists, physicists and biologists to tech CEOs to renowned inventors, we've compiled a list of 11 famous thinkers who dabbled in drugs of the recreational sort--including LSD, marijuana and amphetamines as well as cocaine and cocaine-infused wine (though one claimed to have used marijuana for medical reasons alone).

Check out the slideshow below to see who used which substances and why.