A close family friend consumed a lot of cannabis from his teens through to mid/late 20’s.
He only stopped after he was committed for schizophrenia after trying to drive a digger through a bank wall…he used to try to escape from the institution but they took his clothes so he ended up sat in a mental hospital naked receiving ‘treatment’.
On a happy note, he doesn’t touch drugs now and is happily married with a 5 year old daughter. Although I believe he still has regular counselling.
One of my mates took up cannabis at university and he went from the party animal who always organised trips to various nightclubs at the weekend to someone who hardly ever went out.
On another happy note, he doesn’t touch the stuff anymore and we have our mate back.