SUSTAIN (Studying Solriamfetol Modulation of TAAR-1, Dopamine, and Norepinephrine in Shift Work Disorder) is a Phase 3, multi-center, randomized, double-blind, placebo-controlled, parallel- group trial to assess the efficacy and safety of solriamfetol in adults with excessive sleepiness associated with shift work disorder (SWD).

Eligible subjects must meet the International Classification of Sleep Disorders, Third Edition (ICSD-3) criteria for Shift Work Disorder (SWD). Subjects will be randomized in a 1:1:1 ratio to receive solriamfetol titrated to either 150 mg, 300 mg, or placebo once per night shift for 12 weeks.

Inclusion Criteria:

• Meets International Classification of Sleep Disorders, Third Edition (ICSD-3) criteria for Shift Work Disorder (SWD)
• Provides written informed consent to participate in the study before the conduct of any study procedures.
• Male or female, aged 18 to 65 inclusive.

Exclusion Criteria:

• Prior exposure to solriamfetol/Sunosi, through either a clinical study or prescription.
• Unable to comply with study procedures.
• Medically inappropriate for study participation in the opinion of the investigator.