Amitriptyline
"I've had severe anxiety my whole life paired with depression and bipolar disorder. Ever since I was a child, I've had chronic migraines and headaches, especially at ages where I just shouldn't be having them. My doctor prescribed me this to calm me down and help stabilize my brain activity, so as to halt the anxiety and depression he thought was causing my headaches and migraines.
The pill worked fine after the first few doses, but I guess my body developed a tolerance. Now, when I don't take it, I'm extremely nervous and my depressive tendencies skyrocket. My headaches and migraines never went away. I feel that this pull had a negative effect on me rather than actually helping, and I will be consulting my doctor for something else."