My son since birth does not sleep very well. He always has multiple wake ups and he cannot put himself back to sleep until now. From past 1 year he had a habit of thumb sucking and from last 2 weeks he has forgotten this habit because of which he is having too much sleep trouble. Today my local paediatric has subscribed him melatonin for one month and to teach him to sleep by himself in this time. I have read a lot of mixed reviews about melatonin online. Can someone please tell me melatonin is safe or not?