Do any of you take Melatonin? What dosage?

Discussion on Melatonin is fine and even encouraged, given that ADHD clinics like ADHD 360 can and will prescribe it. It's OTC in nearly every country except the UK.

I have tried it abroad (the IR gummies) and found it effective, but I finally got it prescribed last month but 'extended release', which in theory sounds like it should be released throughout the doubt and keeping me asleep... but I seem to be waking up after 2hr-5hr more frequently for some reason. I titrated on 2mg>4mg. It defo helps send me asleep, so I'm not really sure what to feedback when I see my Psychiatrist.

Anyone else had experience with it, especially IR/XR?