Patients complete the entire battery of neurocognitive tests and questionnaires (FACT-Cognition Perceived Cognitive Impairment subscale, neurocognitive battery, FACIT-Fatigue, FACT Cog Total Score, PROMIS Fatigue, Epworth Sleepiness Scale, Beck Depression Inventory, Beck Anxiety Inventory, and RAND Short Form-36) at baseline (pre-treatment), 24 weeks (end of medication), and 36 weeks (end of wash-out).