Wake and Sleep State Transitions on a Portable Electroencephalogram (EEG) Device in Narcolepsy Type 1 (NT1) and Healthy Participants

Exclusion criteria

• . Has a current diagnosis of cancer except for squamous or basal cell skin cancer.
• . Has a nicotine or marijuana dependence that is likely to have an effect on sleep (example, a participant who routinely awakens at night to smoke) and/or an unwillingness to discontinue all smoking and nicotine use during the confinement portions of the study.
• . Cannot maintain stable sleep environment at home, for example, due to young children not yet sleeping through the night or partners with disrupted sleep (example, shift workers).
• . Undergoing current treatment for hepatitis B with interferon.
• . Has a risk of suicide according to endorsement of Item 4 or 5 of the screening visit Columbia Suicide Severity Rating Scale (C-SSRS) or has made a suicide attempt in the previous 6 months.
• . Has medical condition, such as past or current epilepsy, seizure, head injury/trauma, medically significant unstable cardiovascular, pulmonary, hepatic, renal, or gastrointestinal disease, that interferes with a normal sleep pattern or would preclude enrollment in the view of the investigator.
• . Has a lifetime history of major psychiatric disorder, such as bipolar disorder or schizophrenia.
• . As of the screening visit and throughout the study, the participant should not be a chronic caffeine user, as defined by an excessive (greater than \[\>\] 600 milligram \[mg\]/day) caffeine intake per day.