Being unable to sleep is unbelievably frustrating. One may spend more time in falling asleep than actually sleeping. The person will surely feel miserable the next day if he has not slept properly. People having insomnia tend to wake up too early in the morning, have trouble falling asleep or may stay asleep whole night. Your doctor may recommend you take Ambien to cure insomnia. The effect of this pill can remain even after you wake up next day.