Diphenhydramine
insomnia
"Tried this after my new Dr took me off of Ambien that I'd been on for 3 1/2 years  by a sleep Dr for my insomnia, I can stay wide awake for up to 48 hours & then if I do fall asleep only get between 2-6 hours of sleep. New Dr thinks I'm depressed BUT I'm far from that & keeps wanting to put me on depression medicine!! Called sleep Dr back in Iowa to tell new Dr here in Louisiana that I have insomnia which she did BUT new Dr doesn't believe sleep specialist!!"