Here is a transcript of a recent Diane Rehm Show: http://thedianerehmshow.org/shows/2014-04-21/business-legalized-marijuana-and-ongoing-health-concerns/transcript
Pay special attention to the remarks from Dr. Robert DuPont:
DUPONT
10:11:29
What we're seeing is the addition of a third drug to the two that we've had legal for a long time, alcohol and tobacco. Those two drugs are the leading cause of preventable illness and death in the country. We're now adding a third drug, marijuana, to that list. And we're watching this development in Colorado with much interest and high ambivalence and a sense that this is history being made, there's no question about it.
DUPONT
10:13:01
You know, the way we started this program it was kind of a joke about 4/20 and it's kids having fun. Well, I think it's more than that. It's really adding a very major drug, the drug that causes 60 percent of all the drug dependency in this country is from marijuana. It's more than all the other drugs put together. It's a serious step that we're taking with a kind of giggle and a wink and that's pretty scary.
DUPONT
10:28:38
Well, I think that there -- it's a very curious argument to look at the legal drugs and to say this one is less bad than those and therefore we should do it. That's a very weird argument to make. But I want to go back to what Beau said about alcohol use and marijuana use. There is no doubt in my mind how that's going to play out. The data -- we will see going forward.
DUPONT
10:29:04
Beau says are they substitutes or are they complimentary? The data is extremely clear that the more a population -- a person uses alcohol the more likely that person is to use marijuana. The more the person uses marijuana the heavier their alcohol use, not the less. So I think that -- to me the -- it's clear to me what's going to be found but we need to see it, and there are others who are not so convinced, and that is they are not substitutes. They are complimentary. Increasing marijuana use will increase alcohol use and tobacco use.
DUPONT
10:29:39
Marijuana is a gateway drug to cigarette smoking in the United States today. So rather than stopping smoking cigarettes, when you smoke marijuana the rates of smoking go up with marijuana use. But we'll watch that all and I agree with Beau, that's going to be a very important statistic to study.