The study is designed to look at the usefulness and safety of Solriamfetol (versus placebo) for the treatment of excessive sleepiness associated with shift work disorder (SWD). Study staff nor the participants will know if they are receiving a study drug or placebo. Participants will be male or female subjects 18-65 years old with a diagnosis of SWD. The study will last approximately 17 weeks, with 6 in-person visits and 8 remote visits for each participant.

This is a study to learn more about the use of a study medicine for the treatment of Idiopathic Hypersomnia (IH). The total duration of the study is approximately 3 1/2 months. Men and women between the ages of 18-75, with a primary diagnosis of IH, may be eligible.

This Study will assess whether 20 mg of seltorexant compared with placebo as adjunctive therapy to an SSRI/SNRI antidepressant improves depressive symptoms in participants with MDD and insomnia who have had an inadequate response to current SSRI/SNRI antidepressant therapy.