About Avadel Pharmaceuticals plc Avadel Pharmaceuticals plc AVDL is a biopharmaceutical company primarily focused on the development and U.S. Food and Drug Administration (FDA) approval of FT218, an investigational, once-nightly, extended-release formulation of sodium oxybate designed to treat excessive daytime sleepiness and cataplexy in adults with narcolepsy. For more information, please visit www.avadel.com.