The question of why some kids start using alcohol, cigarettes, marijuana, and other drugs at a young age remains a source of controversy. How much of a role do genes play? The environment -- peers, parents, educational efforts? What about the "gateway theory," the idea that one drug -- marijuana is the most likely to be blamed -- leads to use of others? A new study of twins recently published online by the journal Drug and Alcohol Dependence suggests that genes may play a large role, but to some…

Okay, I'm a bit behind on my reading, but this is worth mentioning even though it's a little late. In its December issue, the American Journal of Public Health published the final, officially sanctioned evaluation of the anti-marijuana ads that former drug czar John Walters bombarded us with during the first half of the Bush administration (the evaluation period ends in June 2004). The bottom line: "[T]he campaign is unlikely to have had favorable effects on youths and may have had delayed unfavorable…

MPP-TV just released this excellent video highlighting the need to tax and regulate marijuana. This piece is especially relevant now that California is considering groundbreaking reform legislation that has triggered a national discussion about the wisdom of marijuana prohibition.

Last Friday I had the opportunity to meet Glenn Greenwald, the best-selling author and Salon contributor who was presenting his report – funded by the Cato Institute – on Portugal's experience decriminalizing personal possession of drugs over the past eight years. Few, even in the drug policy world, have paid much attention to Portugal's remarkable but sensible 2001 decision to remove drug use and possession from the criminal realm and address it solely as a public health issue. The details of Portugal's…

A look at some of the reasons why the United States should consider taxing and regulating marijuana for responsible adult use.

Hear from Illinois medical marijuana patients on why you should support SB 1381 & HB 2514.

Senator Jim Webb (D-Va.) introduced the National Criminal Justice Act of 2009 last week, an exciting piece of legislation that will create a commission to study, among other things, America’s war on drugs. The commission will look broadly at criminal justice reforms, with an emphasis on reducing America's rising prison population (now the largest in the world per capita). Centered in that debate is the hard truth about America’s punitive drug laws. One-third of U.S. inmates are drug offenders, and…

MPP Director of Government Relations Aaron Houston breaks down his testimony to Congress on April 2, 2009.

The evidence continues to mount that cannabinoids -- the unique, active components in marijuana -- fight cancer. The latest such study , just published in the Journal of Clinical Investigation, shows that THC can kill glioma cells through a process known as autophagy. Gioma is a particularly deadly form of brain cancer that afflicts, among others, Sen. Edward M. Kennedy (D-Mass.). The good news is that this study got a decent amount of media attention. The bad news is that much of the coverage lacked…

The journal Clinical EEG and Neuroscience has just published a review of the data on the effects of substance use on the developing brains of adolescents. The unmistakable conclusion: While heavy substance use of any kind is a really bad idea for teens, the damaging effects of alcohol are clearly worse than marijuana. The researchers write: Abnormalities have been seen in brain structure volume, white matter quality, and activation to cognitive tasks, even in youth with as little as 1-2 years of…