Waklert 150 mg Tablet is used in the treatment of excessive daytime sleepiness (narcolepsy). It improves wakefulness helps you to stay awake and reduces the tendency to fall asleep during the day, thus restoring the normal sleep cycle. Armodafinil is used to help people who have narcolepsy, obstructive sleep apnea (also called hypopnea syndrome), or shift work sleep disorders to stay awake during the day. This medicine does not cure these conditions and will only work as long as you continue to take it.