Dr. Lester Grinspoon, Associate Professor Emeritus of Psychiatry at Harvard Medical School

«I don’t believe it [cannabis] is addictive, and there’s no evidence of it being so […] because those people [who enjoy cannabis] can give it up if they want to and will not suffer any withdrawal effects. Some may get a little irritable or depressed. That has nothing to do with withdrawal symptoms.

But addiction data is so deceptive. When some of these kids go through the criminal justice system, they often have to go into therapy. And the therapist, in order to get reimbursed, has to specify a reimbursable diagnosis and so he puts down cannabis addiction or dependence.» (http://www.mademan.com/dr-lester-grinspoon-on-david-brooks-weed-been-there-done-that/#ixzz2qFZQJPuQ)

«They may come across some things that are better than herbal marijuana, for one thing or another… And good luck to them! I’d love that, but I’d never want to see compromised the capacity of people to use herbal marijuana. Whether it’s because the drug that they’ve come up with is much more expensive or it doesn’t do as well or… Whatever the reason!… People should always have herbal marijuana available to them without any constraints from the law.»—Dr. Lester Grinspoon, Associate Professor Emeritus of Psychiatry at Harvard Medical School.