9n was a typo.. on.. lol. I was taking 2 mg melatonin... I have increased it to 10 mg for sleep as well . But it helps keep the LES closed especially at night... you can start with the lower dose. I stopped taking it for a week when I ran out and my reflux came back. I have GERD and LPR.. believe me most doctors don't even know what LPR is or how to treat it . Hope this helps