Armodafinil, marketed as Nuvigil, which is a wakefulness‑promoting agent and it is prescribed for excessive daytime sleepiness associated with narcolepsy, obstructive sleep apnea, or shift‑work sleep disorder. Armodafinil is an R‑enantiomer of modafinil that offers a longer duration of action and higher plasma levels later in the day by increasing the level of dopamine and other neurotransmitters, and helps people to stay sharp and active during the daytime. Armodafinil has many common side effects that include headache, nausea, dizziness, and insomnia, with rare but serious risks such as rash, psychiatric symptoms, or cardiovascular events. To have more details about Armodafinil, visit the website of Health Matter.