Waklert 150 is a wakefulness-promoting medication that helps people who suffer from sleep disorders like narcolepsy or obstructive sleep apnea stay awake throughout the day. It also works well as a stimulant for attention deficit hyperactivity disorder (ADHD). The drug is an effective choice for those who want to improve their focus and concentration, but it can cause some unpleasant side effects when taken incorrectly. The best way to avoid these unpleasant effects is to take the drug at a fixed time each day and not exceed the prescribed dose.