Modvigil is used to treat sleep disorders like narcolepsy and excessive daytime sleepiness.It is called as nootropics drug. It enhances memory of the patient. Hence it is also called as a smart drug.It improves wakefulness and focus in a patient. It treats depression in a patient that he is experiencing due to bipolar disorder. Modvigil is US FDA approved drug. Modvigil is cheaply available on quickmedpill.com.