More effective than caffeine but not as effective as adderall, with the unwanted speedy feeling side effects also being in between.
I've used all kinds of legal and illegal "speed" for studying and for work and yes, it is usually extremely effective. The biggest benefit is improved focus and concentration, and it can also help you stay up late (or all night).
and if one wants to stop studying and go sleep 11pm to 6am, does the med cause problems with sleep ?
Yes, a lot of these drugs make it very hard to sleep for 3-12 hours (depending on the drug and dose).
Better question might be whether anyone "here" _hasn't_ used some form of amphetamines as a nootropic.
yes it's great. get work done and lose some weight.