A Long-term Extension Study of ORX750 in Participants With Narcolepsy and Idiopathic Hypersomnia

Inclusion Criteria: * Diagnosis of narcolepsy (NT1 or NT2) or IH who was eligible for and completed the full treatment period in the eligible parent study ORX750-0201 (CRYSTAL-1) * Is willing and able to adhere to additional protocol requirements Exclusion Criteria: * Development of any new disease/disorder that in the opinion of the investigator would make the participant unable to continue the study * Unable to refrain from excluded medications, including those used for treatment of narcolepsy or idiopathic hypersomnia