make sure if he wants to continue smoking weed, that he knows where it comes from, and he rolls his own joints...bowls, whatever but people do tend to that a lot...

if he does want to go see a psych doctor...i recommend against it from my experience, if youve known for as long as you have, you know what kind of person he is...you could tell there was something not right with him, doctors wont see it like that. you know him, how he is..all that but doctors will try to put him on meds....maybe even a psych evaluation and hold him for a few days. I myself went to the hospital for a similar thing...the doc put me on ativan, a mild mood relaxer/stabilizer, basically a chill pill but after taking it for a while since they wouldnt let me off it, i started getting seizures....medications from a lot of the doctors really dont mix with me, and ive had little success from other peole i know.

he may just be freaking out from the side effects still, might be afraid it will happen again...but if he knows what he's smoking, where it comes from..so on, he knows theres not gonna be anything funny in it...wed has side effects of paranoia also, so it may also be affecting his judgement on whther or not he wants to....but tell him to relax and not to trust other people and their weed..best solution

alot of the heavy drugs like heroin, crack/cocaine, pcp....have a lot of impairing side effects and judgement, alot of people that get addicted to it usually end up obsessing about making more money...for more drugs, weed isnt like that really...it doesnt have a heavy addiction, i dont really get cravings to go peel off sewer manhole covers for my next high for weed...lol but the paranoia can get to you sometimes.