Amitriptyline
"I have chronic Lyme disease and one of the worst things I suffer with is pain, EVERY DAY for the last 6 years. I have tried many things to help, both homeopathic and medicines prescribed by a doctor. 
I found a new doctor months ago who prescribed me Elavil. I'm always a bit apprehensive about taking medicines even though I know I don't have much choice if I want my life back. So I agreed to try 10mg of Elavil at bedtime every night. 
I can't believe how much it has helped. After four days, I woke up pain free for the first time in 6 years and I actually had a good cry! It's been a miracle. 
I've been far more active lately and am even aiming to get back to work again. I hope that other people with Lyme/chronic headaches see this and try it too."