A couple years back I was taking 3mg of melatonin nightly. It worked brilliantly for about 3 months. After that, while I'd feel sleepy and fall asleep as expect

A couple years back I was taking 3mg of melatonin nightly. It worked brilliantly for about 3 months. After that, while I'd feel sleepy and fall asleep as expected, I'd be wide awake 1 sleep cycle later (~90min). I'd still recommend melatonin as a short term way to re-establish a regular bedtime/routine. Long term usage - less so.