Regular use of melatonin to help kids sleep has become “exceedingly common,” with nearly 1 in 5 adolescents (19 percent) using it, according to research published in the journal JAMA Pediatrics.

The use of over-the-counter melatonin as a sleep aid is on the rise. But a new study has found some people may be taking it at dangerously high levels. A report by CNN Health cites sleep ...