Pepper, yeah downers/opiates aren't that helpful at school, or very acceptable. Most students I knew in college smoked weed and drank a lot and that was about it. Some uppers, but only really used by those with ADHD to study (the cokeheads I met all dropped out or got clean, lol). Psychedelics are fairly common at uni as people are into experimenting (my first experience with RCs was in college back in 2003 with 5MeoDipt). Focus on your work and getting a good degree and network for the next step afterwards. Enjoy yourself, but use partying as a reward when you get your homework and studying done, don't put it off.
Advice from someone who partied their ass off in college yet also worked really really really hard and succeeded (graduated with a good GPA and honors in my major and in a second area too).