Carl Sagan was a marijuana user:
US: Wire: Biographer: Sagan Smoked Marijuana

In Edison's time there were many types of drugs available, including extremely strong cannabis, hash and hash oil-type preparations available at drug stores OTC. There were also dens for the "other" smokable stuff, which he may have indulged in. It wouldn't surprise me if he experimented with or even regularly used a drug or combination of drugs during his lifetime.
Breukelen advocaat Reviewed by Breukelen advocaat on . did Edison light up? i like to read the newspaper in the morning. We get the Washington Post. Yesterday I was reading the Style section and I came across the following excerpt from an article about magazines: Did Edison Light Up? Thomas Alva Edison in the genius who gave us the light bulb and the phonograph. Who knew he also wrote at least one surrealistic prose poem? That poem appears in Volume 6 of "The Papers of Thomas A. Edison", soon to be published by John Hopkins University Press, and it was Rating: 5