"it does work, depending on your dosage. but when i use it i find that i&#039;m hyperactive, jittery, over excited, slightly aroused, and sometimes in a good mood (but that changes when it crashes). it&#039;s similar to coffee in its side effects but it lasts much much longer. after i come home from college i find i&#039;m depressed (on occasion), still jittery, still &quot;wound up&quot;, sometimes exited, and very uncomfortable. while it does help me focus it is not pleasant to be on it. i took the 54 mg dosage but i have been on smaller dosages before and has the same issues. also when driving i feel like it lowers my ability to drive but i&#039;m not 100% sure if it does or if its my imagination."