Modalert 200mg contains Modafinil as an active ingredient that promotes wakefulness in patients with shift work sleep disorder & excessive sleepiness due to narcolepsy or obstructive sleep apnea. It works to keep you awake during working hours especially when you don’t want an unwanted excessive sleepiness. It is a prescription only medicines in the United States of America (USA), United Kingdome (UK), Europe (EU), Canada (CA) & Australia (AU).