General anesthesia is required for many surgeries, but may cause lingering fatigue, sedation, and/or drowsiness after surgery that lasts for hours to days. In outpatient surgery the sedation, fatigue, and occasional dizziness is problematic. Modafinil was tested as a potential remedy to alleviate these symptoms. For example, it was expected that modafinil would help people recover quicker from general anesthesia after a short surgery, but the results were uncertain and the inconclusive studies could not reliably verify the expectation. The use of modafinil to relieve post-anesthesia sedation is investigational.