Hang on - hold the press - this is extremely relevant!!

You’re a non drinker and your ‘friends’ had no issue, problem or concern about you stumbling around drunk, making speeches and doing stand up that wrecked your relationship?? If (whilst regaling you with stories of your exploits), no one mentioned how out of character it was for you, or that they tried getting you to sleep it off, I think you just found out who spiked you. Sorry dude.

ETA: Get that tox screen and press charges on whoever spiked you, even if it was just with alcohol.