Nuvigil (Armodafinil) is a medication used to “promote wakefulness” when treating people with disorders like narcolepsy, sleep apnea or shift work sleep disorder. In Multiple Sclerosis (MS) Nuvigil is a popular choice for treating fatigue. Nuvigil is often compared to Adderall which is primarily used to treat ADHD (attention-deficit/hyperactivity disorder) but I am not sure if it is also an actual amphetamine or not; from what I gather, the chemical structure is very similar. That being said, Adderall is a schedule II controlled substance and Nuvigil is a schedule IV. Schedule II is defined as “drugs with a high potential for abuse, with use potentially leading to severe psychological or physical dependence. These drugs are also considered dangerous” where schedule IV is defined as “drugs with a low potential for abuse and low risk of dependence”. Just for reference, there are 5 schedules (I-V) and the lower the number the more “dangerous”; heroin is a schedule I drug and a cough medication like Robitussin is schedule V. So knowing that I have to imagine it is not exactly the same.