Anonymous wrote:First get a grip on yourself.
Then . . .
Laugh. Ask how bad the hangover was. Give him your best "home remedy" for hangovers.
FFS
Wow, ( not op) are you always so flippant?. You don't care because he isn't your son. The dangers of alcohol are serious and while I would expect college students to experiment, I would hope they would not get blind drunk.
I wouldn't freak out but, I would be very concerned. If he is three hours away perhaps you can visit him and talk ( again) about the dangers of alcohol ( not only to himself..killing brain cells, damaging liver) but he could get into serious situations...tell him you don't expect him to abstain but you will expect him to not get drunk. Sure, he might hide the drinking but, then I wouldn't be giving him any extra money. If he wants beer money (for beer or pot) he will have to work to buy it himself.
Remind him you expect good grades and if they slip than you will do X ( that's up to you to decide what punishment will fit)
Good luck! We have alcoholism and mental health issues in both sides of our family and I would worry if he was trying to self medicate. (ADHD, bi-polar etc) if I were you.