Amitriptyline
"I have been taking this medicine (25mg) for a little over two weeks. I have to take it 13 hours before I want to wake up. If I take it right before I go to bed, I will sleep for 12 hours. I also am very tired throughout the day, and it is common for me to take a 4 hour nap (just to make it through the day). I believe it has helped my headache in that I am sleeping so much I can't feel the pain anymore."