Health KemPharm Receives FDA Orphan Drug Designation for Serdexmethylphenidate (SDX) for the Treatment of Idiopathic Hypersomnia (IH) By Globe News Wire On Nov 20, 2022 24 Share Phase 2 clinical trial investigating KP1077 in patients with IH expected to initiate prior to year-end 2022 DesignationDrugFDAHypersomniaIdiopathic 24 Share