Are there any side effects from long term use of the herbal sleep aid Melatonin?
None that I've ever heard of. Being a natural sleep aid , your system would just get used to it and it wouldn't be as effective any more.
No; used according to directions itsvery safe.
Your body just becomes immune to the melatonin, That's why you're supposed to take it Every other month, 1 month on one month off.