Artvigil 150 is a potent wakefulness-promoting medicine used to treat sleep disorders such narcolepsy, obstructive sleep apnea, and shift work sleep disorder. It is the R-enantiomer of modafinil, which makes it more effective and lasts longer for many users. Artvigil 150 can improve attention, alertness, and mental clarity for up to 12-15 hours while producing less crashes than typica... https://www.smartfinil.net/product/artvigil-150/