Melatonin's a good complement to modafinil in that respect. You can take either one, change your mind, and usually be able to get up or go to sleep despite the

Melatonin's a good complement to modafinil in that respect. You can take either one, change your mind, and usually be able to get up or go to sleep despite the action of the drug. Nothing is as important, though, as keeping all sources of light out of your bedroom during the hours you're trying to sleep.