Dextroamphetamine isn't as good as methylphenidate for focus but it seems better for keeping me awake from hypersomnia. It was too late to take Vyvanse 50mg at 5pm (Slept from 12am to 5pm) so I slept from 7pm to 12am and then 1am to 9am, took Vyvanse and it kicked in half an hour later.