Artvigil 150mg tablet is used to enhance wakefulness in people with daytime sleepiness due to shift work sleep disorder & drowsiness due to narcolepsy or obstructive sleep apnea. It works to enhance memory and cognitive functions by affecting certain chemicals in the brain called neurotransmitters that helps to promote awakeness and cognitive function. Artvigil 150mg tablet is a centrally acting stimulant prescribed to keep you awake by promoting wakefulness in patients with shift work sleep disorder & excessive sleepiness due to narcolepsy & obstructive sleep apnea. Artvigil 150mg is a generic version of Armodafinil 150mg sold under the trade name Nuvigil 150mg in the United States of America (USA), United Kingdom (UK), Europe (EU), Canada & Australia (AU). Armodafinil consists of the (R)-(−)-enantiomer of the racemic modafinil. This medication is a Schedule 4 prescription-only medicine in Australia & United States. So, take it only if you are prescribed with this medication.