It's interesting that the article mentions the importance of not disrupting the body's natural ability to produce melatonin but does not mention melatonin when talking about sleep medication. As far as I understand artifial melatonin actually increases REM sleep, does not trigger sleep walking and can be taken for longer than a week. In my experience it does increase the intensity of dreams which could be a negative side effect if you are prone to nightmares. I went through a period of poor pre bed habits - staying up late, using my phone and not taking the time to unwind and I would take .75 mg of melatonin right before going to sleep in an effort to 'correct' for my bad habits. I would not recommend this as a lifestyle at all but if you have to rely on medication, melatonin seems to be one of the more effective sleep aids out there.