<unk> , sold under the brand name Keppra among others, is a medication used to treat epilepsy. It is used for partial-onset, myoclonic, or tonic–clonic seizures and is taken either by mouth as an immediate or extended release formulation or by injection into a vein. Common side effects of<unk>  include sleepiness, dizziness, feeling tired, and aggression. Severe side effects may include psychosis, suicide, and allergic reactions such as Stevens–Johnson syndrome or anaphylaxis. It is unclear if<unk>  is safe for use during pregnancy and breastfeeding.<unk>  is the S-enantiomer of etiracetam. Its mechanism of action is not yet clear.<unk>  was approved for medical use in the United States in 1999 and is available as a generic medication. In 2019, it was the 97th most commonly prescribed medication in the United States, with more than 7million prescriptions.
Levetiracetam
Piracetam
Phenylpiracetam
Mesuximide
Dimiracetam
Brivaracetam
Lamotrigine
Ethosuximide