Solriamfetol hydrochloride is primarily used in the treatment of excessive daytime sleepiness (EDS) associated with narcolepsy or obstructive sleep apnea (OSA). It works by increasing wakefulness and alertness in patients, helping them stay awake during the day. This medication is particularly beneficial for individuals who struggle with maintaining normal wakefulness despite adequate sleep. It is often prescribed when other treatments or lifestyle changes have not been effective. Patients typically take it orally in the morning to avoid interference with nighttime sleep. It is important to follow medical guidance to manage dosage and monitor for potential side effects.