We hear a lot about the down side of prescription painkillers, right? And it's a trade off, the easing of pain against the danger of addiction or even overdose. CNN's Dr. Sanjay Gupta says for many patients there's another good yet equally controversial option: medical marijuana.

Dr. Gupta told Chris Cuomo on "New Day" Monday: "Ninety-four percent of the studies in this country that I reviewed looked specifically for harm, not for benefit. So you get a distorted picture and that's part of the problem, but I think that starts to have an impact on the way people actually think about this substance as well. Very different than in other countries. You have a medication out there right now to help treat MS for example, very tough thing to treat, its approved in 25 countries Chris, not the United States."

If you want to learn more about this issue, see Dr. Gupta's take here and watch"Weed 2: Cannabis Madness."

It premieres Tuesday, March 11, at 10pm Eastern on CNN.