sounds like he just pulled a whity, let him puke then get him to bed then rip the piss outa him in the mourning!! only joking, let him sleep it off, he'll probably feel like he's been hit by a truck when he wakes up, just give him a joint and that'll starighten him out, beer is a good stabliser for ganj although do be careful, taken in the right sequence it can amplifie the effect of solid.
Grass before beer and youre in the clear, beer before grass and youre on youre ass