This sure didn't work for my son. I took him to a large, local hospital because his behavior was so erratic. They called the police who wanted to arrest him. Luckily, through his friend's sister (a social worker), we got him admitted to another hospital nearby which treated his acute psychosis. He had had a previous psychotic break 5 years earlier while in college.
Once he quit mixing alcohol and marijuana, his life improved immensely. It's now 20 years later and he's a happily married man with 3 children.
Good luck getting police or 911 to help with a mentally impaired individual even today. In Los Angeles, they often get shot.