A close friend used modafinil for about two years, taking about 4 hours sleep per night during the week and catching up to some extent on the weekends. He had greatly improved concentration and motivation at the time, but he crashed at the end of that 2 year time period. He was so sick that he thought he had cancer and his immune system was shot - he contracted one illness after another. 5 years later he has not recovered psychologically and has bouts of depression and general malaise frequently.
|