Dolce: He insists that young people who smoke “suffer IQ loss and perform worse on cognitive tests.”
Grinspoon: Both of those statements are absolute nonsense. I’d like to see the data he finds convincing. I’ve been reading it for a long time now, and I find no data for either contention. A lot of those cognitive studies were compromised.
Let me give you a little anecdote. Years ago I got a call from the editor of a journal called Depression who asked me to give my feedback on an article on cannabis being useful in treating depression. I explored it and it seemed to be true. By the time the article was published, I noticed a new paragraph at the end that said we want the readers to know that while the studies say that marijuana is useful in treating depression, we in no way support its use for depression or any other purpose. And I said, “Why in the world did you add this last paragraph?” The editor almost started crying. She said, “Dr. Grinspoon, our lab is supported by NIDA [National Institute on Drug Abuse] and if we don’t include that we jeopardize our funding.” You’ve got to be careful with a lot of that literature. They won’t publish anything positive about marijuana.