Methylphenidate
"it's a lot more mild than Ritalin and more effective than Focalin. The only problem i have with it would be weight loss (i'm 5'2" and only 100 lbs) and sometimes i can't react as quickly as i would without the medication. weird, but an awesome drug for any adhd or add college student. It instantly gets rid of fidgeting and you'll be able to listen and focus to the most boring lecture imaginable (and learn from it!)."