Hello @elg920 and welcome to Mayo Connect. I see that you are interested in knowing how much melatonin is too much. Is that the case? As you probably know, Mayo Connect is not able to offer medical advice as we are not medical professionals, but patients like yourself.

I did some research online and found this article on Cleveland Clinic's website. Here is the link to that article, https://health.clevelandclinic.org/melatonin-how-much-should-i-take-for-a-good-nights-rest/.

Have you talked with your doctor about this? According to the article, it is different for each person.

How long have you been taking melatonin?