Catalyst Pharmaceuticals, Inc. is a commercial-stage biopharmaceutical company focused on in-licensing, developing, and commercializing medicines for patients living with rare and difficult-to-treat diseases. The Company markets three drug products: FIRDAPSE (amifampridine), FYCOMPA (perampanel), and AGAMREE (vamorolone). FIRDAPSE is a treatment for people six years of age or older living with Lambert-Eaton myasthenic syndrome (LEMS). The Company, through its sub-licensee, also offers FIRDAPSE in Canada and Japan. FYCOMPA is a prescription medicine used alone or with other medicines to treat partial-onset seizures with or without secondarily generalized seizures in people with epilepsy aged four and older and with other medicines to treat primary generalized tonic-clonic seizures in people with epilepsy aged 12 and older. AGAMREE is a corticosteroid with a structure that retains the potent anti-inflammatory effects of traditional corticosteroids used in Duchenne muscular dystrophy.