<unk>  is a drug marketed as a treatment for myoclonus and a cognitive enhancer. Evidence to support its use is unclear, with some studies showing modest benefits in specific populations and others showing minimal or no benefit.<unk>  is sold as a medication in many European countries. Sale of<unk>  is not illegal in the United States, although it is not regulated nor approved by the FDA so it is legally sold for research use only.<unk>  is in the racetams group, with chemical name 2-oxo-1-pyrrolidine acetamide. It is a derivative of the neurotransmitter GABA and shares the same 2-oxo-pyrrolidone base structure with pyroglutamic acid.<unk>  is a cyclic derivative of GABA (gamma-aminobutyric acid). Related drugs include the anticonvulsants levetiracetam and brivaracetam, and the putative nootropics aniracetam and phenylpiracetam.
Piracetam
Phenylpiracetam
Dimiracetam
Levetiracetam
Brivaracetam
Mesuximide
Ethosuximide
Lamotrigine