What parents need to know before giving kids melatonin

Nearly 6% of preschoolers, ages 1 to 4, had been given the sleep supplement melatonin, according to a recent survey. (Aya Koike/Getty Images)

What do you do when you can't get your kids to settle down to go to sleep? For a growing number of parents, the answer is melatonin.

Recent research shows nearly one in five school-age children and adolescents are now using the supplement on a regular basis. Pediatricians say that's cause for alarm.