Drink water and watch something to distract your attention, as jannanleon said though it really depends what there on.
by doin things that u concentrate to much... like for me when i play video games i focus to much and it kills my high
depends.. what drug did he/she get high on? lol.. it really depends on how much they took
dont think there is a way to do tht sorry just wait it out
i dont think thats possible. I guess time.