I didn't sleep for a month except short 'non-REM' sleep and despite visits to several different doctors couldn't get anything strong enough to get me back to sleep, because 1) they do not like to prescribe meds like 'LUNESTA' nowadays (researched that issue) and only 'old science meds' which didn't do a damn thing for me. I decided to try Melatonin 'once again' after 9 months of hell and past years trying it with zero success - but this time - upped the dose and toughed it out and I've been getting back to normal on my sleep recently by taking 10-40mg of 'over-the-counter' melatonin. I'm actually a bit amazed that it's helped and had done some 'serious research' leading up to me giving it another try, and finding links between Vitamin D, B and Melatonin production from 'Pineal Gland' in our 'Lizard Brain' so also megao-dosing D3, B-Complex along with the Melatonin - after the D and B alone didn't get me to sleep - and the others 'might be helping alleviate some of the other stuff'.