insomnia
"Sometimes it works and...sometimes it doesn't. The effects are not as obvious to me as prescription medications. 6 mg seems to be my sweet spot; any more and it has no effect. I try taking it when I know my sleep schedule needs fixing and that I'll be awake late otherwise, and it can work like that when taken infrequently. But it's not my first choice. Can give me nightmares also. As a younger man (22 years old), I've read that melatonin supplements work more effectively on older individuals, which may explain my hit-or-miss case with it."