Longboard Pharmaceuticals, Inc., a clinical-stage biopharmaceutical company, focuses on developing medicines for neurological diseases. Its products include LP352, a Phase I clinical trial product for the developmental and epileptic encephalopathies (DEEs) and refractory epilepsies; LP143, a product for amyotrophic lateral sclerosis and other neuroinflammatory disorders; and LP659, a product for multiple neuroinflammatory disorders. Longboard Pharmaceuticals, Inc. was formerly known as Arena Neuroscience, Inc. and changed its name to Longboard Pharmaceuticals, Inc. in October 2020. The company was founded in 2020 and is based in San Diego, California.