For those who argue that marijuana is no more dangerous than tobacco and alcohol, Volkow has two main answers: We don’t entirely know , and, simultaneously, that is precisely the point .
“Look at the evidence,” Volkow said in an interview on the National Institutes of Health campus, pointing to the harms already inflicted by tobacco and alcohol. “It’s not subtle — it’s huge. Legal drugs are the main problem that we have in our country as it relates to morbidity and mortality. By far. Many more people die of tobacco than all of the drugs together. Many more people die of alcohol than all of the illicit drugs together.
“And it’s not because they are more dangerous or addictive. Not at all — they are less dangerous. It’s because they are legal. . . . The legalization process generates a much greater exposure of people and hence of negative consequences that will emerge. And that’s why I always say, ‘Can we as a country afford to have a third legal drug? Can we?’ We know the costs already on health care, we know the costs on accidents, on lost productivity. I let the numbers speak for themselves.”