<unk>  is a central nervous system agent that is FDA approved for the treatment of obstructive sleep apnea (OSA), narcolepsy, or shift work disorder (SWD).   Common adverse reactions include headache, nausea, dizziness, and insomnia.
Armodafinil
Adrafinil
Modafinil
Ketobemidone
Dexmethylphenidate
Pirfenidone
Methylphenidate 
Valpromide