I read that it lasts 24 hours with almost no side effects (per "Delivered from Distraction" book by Hallowell/Ratey) and no abuse potential (therefore not a controlled substance), but it is rarely prescribed. Does anybody have info or experience with this? I am currently on Ritalin LA, 30 mg. and it works pretty well, but I love the idea of a 24-hour effect with no hassle getting refills! Thanks.