Marijuana and the Adolescent Brain: Is it safe? Amir Levine, MD. Columbia University Medical Center. March 24, 2021 cbdnews How Marijuana Works Comments Off on Marijuana and the Adolescent Brain: Is it safe? Amir Levine, MD. Columbia University Medical Center. In a presentation at the District Theater in Aspen, Colorado on January 21, 2017, Dr. Amir Levine, a child psychiatrist, explained how marijuana negatively …