I took melatonin to get over jet lag on a trip from the US to Germany. Kept me awake for 3 days. Benadryl does work. I don't get hung over from that. But in Spring, I suffer badly from insomnia & only seroquel plus xanax helps (I take xanax for OCD, it's the only thing that works to make me stop cleaning 24/7)
And I once just smelled a jar full of mugwort at a health food store. Slept for 10 hours!! Each of us has different reactions to different things