 As of 2015 it had been studied for use in multiple sclerosis associated fatigue, but the resulting evidence was weak and inconclusive.General anesthesia is required for many surgeries, but there may be lingering fatigue, sedation, and/or drowsiness after surgery has ended that lasts for hours to days.In outpatient settings wherein patients are discharged home after surgery, this sedation, fatigue and occasional dizziness is problematic.