insomnia
"Being 24 years old, I have horrible sleep habits.  There are days I have to wake up early for school or work, and other days I sleep in, so the time that I go to sleep every night varies.  Also, when I have something happening in the morning (work, school, etc...), my mind is constantly racing while I am trying to sleep.  Now, before I go to sleep every night I take melatonin (The Natrol brand), and it definitely relaxes me so I can comfortably fall asleep.  Other sleeping pills I have previously used would make me wake up feeling groggy, still very tired, and with a migraine.  Unlike other sleeping pills, I wake up feeling refreshed after taking melatonin.  I would highly recommend."