It works the problem is it will stop working and the withdrawal is still a bitch. You will need to take breaks and then during that time u will be even more lethargic. I wouldn't even bother unless u want to develop a dependency. It is addictive don't believe that is not as bad as like adderall or ritalin. It's just not much different from those. The crash still sucks and it's not avoidable. I guess if u eat well and your nutrition is really great. Reduces appetite too. It might be easier to be on it while younger but as u get older it's harder to tolerate stimulants. The side effects get worse as u age.