"We have been terribly and systematically misled for nearly 70 years in the United States, and I apologize for my own role in that," he wrote in an op-ed published Thursday on CNN.com.

"It doesn't have a high potential for abuse, and there are very legitimate medical applications. In fact, sometimes marijuana is the only thing that works."

Gupta, who authored a 2009 Time magazine article titled "Why I would Vote No on Pot," changed his mind while working on his documentary "Weed," which airs Sunday at 8 p.m. on CNN.

…Gupta said he did not come across a single incident of marijuana overdose in his research.…

It is impossible to overdose on marijuana, apparently.

Reminder that this show airs tonight so set your Tivo.

Marijuana assuages inflammation, the bane of many human ailments:

http://pandawhale.com/post/32857/inflammation-is-the-new-health-crisis

Dr. Sanjay Gupta tweeted that it was not an easy article to write, but it is honest:

https://twitter.com/drsanjaygupta/status/365481182437187584

Dr. Sanjay Gupta joining our side of the medical marijuana debate is a very big deal.

His op-ed piece is definitely a great read:

http://www.cnn.com/2013/08/08/health/gupta-changed-mind-marijuana/index.html