My friend has severe ADD and he will sell me his 25mg extended release ones really cheap. I've been up for 60 hours straight numerous times. It's really trippy when you don't sleep for a couple of days. Your head feels so light and you see things move when they don't

I didn't know how long they lasted at first and one night I ended up taking like 15 in a 24-hour period. I got an A on the paper that was due and a 95 on my Child Psych exam so I'm not complaining