Exhibit 99.1 Zevra Therapeutics Reports First Quarter 2024 Financial Results and Corporate Updates Full commercial launch of OLPRUVA at the end of January 2024, with market access growing to ~75% of covered lives as of May 1, 2024 Arimoclomol NDA review underway with PDUFA date of September 21, 2024 Reported positive topline results from KP1077 Phase 2 Trial in idiopathic hypersomnia, with full data to be presented at SLEEP 2024 in early June 2024 Conference call scheduled for today, May 8, 2024, at 8:00 a. ...