My daughter was on this about a year ago to help with a chronic headache and sleep.
We used it for a couple of months before taking her off from it because we thought it might be giving her tachycardia.
It did work for sleep but it didn't help her headache. It also was not the cause of her tachycardia.
During the time she was on it, she appeared to feel better than she has in a while. We had made other changes in her treatment that we thought were the cause, but looking back, we have decided maybe it was the Doxepin. So we are trying it again to see what happens. I just gave her the first dose tonight.