We have written repeatedly about the association between marijuana use and mental illness.

Recently, psychiatrist Dr. Joshua Weiner visited with Washington, D.C.’s NBC4 News about the effects of marijuana use.

Interestingly, Dr. Weiner isn’t necessarily opposed to marijuana use, but in the interview he warned about the harm it can cause to mental health.

Among other things, Dr. Weiner noted that chronic marijuana use is tied to anxiety, and that the risk of developing schizophrenia doubles for marijuana users.

Dr. Weiner also noted that the risks are greater for younger marijuana users.

All of this underscores what we have said for years: Marijuana may be many things, but “harmless” simply is not one of them.

You can watch the entire interview below.