Modafinil isn't euphoric, and really doesn't have much recreational potential at all. It'll keep you energized, awake, and alert like other stimulants but without the rapid thoughts, euphoria, and other million short term side effects. if you use it to keep you awake, you should go with 200mg. when i take 200mg, i feel like i just got another few hours of sleep, but if i take more i feel fatigued, anxious, and actually kinda tired, but like the tiredness you get when your on ampthetamines and haven't slept for 36 hours, not like a normal tiredness. other than energy, it doesn't really have that many uses though.