Doxepin
"In my never ending quest for migraine prevention, my doctor decided to try doxepin to try to take out the migraines, the anxiety, and the insomnia all at once, figuring it "couldn't hurt." Well. It hurt. No effect on migraines, sleep, or anxiety. None at all. It did, though, drop my blood pressure so low I couldn't walk for long, needed to lean on walls to stay upright, couldn't carry a cohesive conversation because I was too foggy to remember what I'd already said - in short, it did no good and left me unable to function at work, safely drive, make it up the steps to my bedroom, etc. Pulse also became erratic. And? I was only on half the child's starting dose. It was bad enough that I stopped it and then told the doctor."