Ok drinking is awesome but you are drinking for the wrong reasons (i.e. not socalizing and having fun).
Second, ritalin is terrible (I actually took Focalin, which is the same active ingredient only refined for more potency and less side effects... in theory, really it's just way more potent). The crash you get from it is absolutely brutal. I never get depressed but when I came down off ritalin I always felt as if the world was ending. In college that was a pain in the ass for me since I needed it for class but hated the side effects and was continually debating which would harm me more. Honestly, I don't take my medicine anymore because I found an occupation where having a short attention span isn't a big deal, and in fact a positive - in general I feel much better than I did when I was forced to use that stuff.
Cocaine makes the side effects of ritalin and focalin... even adderall (although adderall is much milder, less effective, and in my opinion a very over-rated and crappy drug) look ridiculous. The comedown from those drugs is probably 3 times worse than coke. Which is funny because you have students popping pills all day looking down upon people who do cocaine recreationally, when in fact the kids who are popping pills have the serious problem. Just food for thought.