I have a medical card as well..which the only reason I like this card is because of the stigma with marij...I am very much a rule follower...so having the license...makes it legal for me to have it...but not at the Federal level...which makes no ****ing sense to me.

I go to the dispensery at least 4 times a week...mostly for my son...I get a pre rolled joint there 2x a week..not knowing what it is going to do for me...sometimes I get anxious..sometimes I get relaxed.

Sometimes the same strain does different things to me on different days.

I never hear of weed causing psychosis..I think that is quite the stretch.
I think the OPs friend has much more going on than a little bit of weed impacting him.