That's the exception more than the rule.

And frankly, what you say happened is illegal in America. Adderall is a schedule 2 controlled substance, which means no refills at all, much less for a year.

edit: I can't reply below so I'll do it here. Agreed -- there's a scary underside to this story and its that at most universities (especially the top-tier), its much too easy to walk in and get a prescription. Also, at both universities I've attended it was known that you could buy it in certain areas in the library.