Studies have found that marijuana use hinders memory, learning, judgment and reaction times, while steroids cause aggression and violent mood swings. Ecstasy use is rising among young people, Rusche said, and scientists have found that drug destroys neurons that make serotonin, a chemical crucial in controlling sleep, violence, mood swings and sexual urges. While doctors and scientists know about some effects drugs have on the brain, they don't have a full picture, Rusche said. When people start using a drug, the scientists know nothing about it. Once enough people take it, scientists apply for grants and start studying it.
People are inventive.
They find new drugs or new ways to take old drugs-like crack from cocaine. The classic example is cigarettes. We allowed people to smoke for 100 years before we knew about all the horrible things that nicotine will do. All Rights Reserved. Terms under which this service is provided to you.