Hi and welcome.
I have quite a bit of experience with EU speed.
Its purity is veeeery low, let's say I usually snort between half a gram to a gram (weight before drying) to feel decent effects.
Dunno about using it for study sessions, all I want to do when I'm on speed is to chain smoke cigs, run my mouth A LOT, dance or generally chill out, not doing complicated stuff.
The effects I experience at medium doses are obviously physical stimulation but at the same time I feel relaxed.
I feel energized, sociable etc. but not super spun or super focused.
This goes on for a few hours and the comedown isn't too terrible, but then again I always have some benzos and/or opiates on hand, personally I don't like doing stimulants without something for the comedown.
I can move this thread in
Other Drugs if you want, just PM me
