Short answer: yes. Longer answer: Nothing is perfectly safe. There is probably someone out there allergic to melatonin, and I'd be the last person to tell them they're not. With anything you're taking if you notice a dramatic change in how you feel, immediately suspect it. Maybe the change is good (like antibiotics for bacterial …
Every sleep discussion has to center around the concerns and issues around sleep.
Dr. Beus apprears to be wrong about melatonin's effect, dosage, and its use in children. I can only hope that his expert opinion does not completely derail the use of melatonin, making patients far more likely to take the new drug versions of melatonin that have recently come to market.