<unk>  is a central nervous system agent that is FDA approved for the treatment of chorea associated with Huntington's disease. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include Sedation,somnolence, fatigue, insomnia, depression, akathisia, anxiety, nausea.
Tetrabenazine
Tiagabine
Retigabine
Ezogabine
Lamotrigine
Mesuximide
Deutetrabenazine
Levetiracetam 