<p>Make him drink water. Don’t let him drink anymore. Give him some bread if he thinks he can stomach it.</p>
<p>If he’s still walking/standing/everything on his own, he is probably okay. If he starts throwing up, you should make sure he falls asleep on his stomach or side (a good idea anyway), and I’d suggest maybe staying awake a while to make sure nothing happens. (An hour to two)
But this is if he’s getting sick, not if he’s just drunk. If he’s got a sudden change in behavior, watch out for it. Otherwise getting him to sleep is probably wise.</p>
<p>However, if he still seems to be in charge of his own mind/body, let him do his thing, just make sure he doesn’t decide to do anything really stupid.</p>