Solriamfetol hydrochloride is the hydrochloride salt of solriamfetol, a synthetic pharmaceutical compound and selective dopamine-norepinephrine reuptake inhibitor (DNRI) with the molecular formula C₁₄H₁₅ClN₂O₂ and CAS number 178429-98-4. It is available as a white to off-white powder with a purity of 98% or higher, commonly used as a reference standard or intermediate in pharmaceutical research and development. Clinically, it 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.