Amitriptyline
"My neurologist started me out on 10 mg of Elavil and within a couple of weeks I began taking 25 mg. It took about a month for it to take effect but until then I had a headache almost every single day. After that, nothing. So, yes, it was very effective for me. The only side effects that I noticed were increased appetite (very much so) and weight gain. I gained about 12-14 pounds within the 4.5 months that I was on Elavil. Normally this wouldn't be a problem. To be honest the added pounds was worth being pain free, but my wedding was in a few months and nothing besides going off the medication would stop the weight gain. Now I'm taking Topamax, which is doing the job but the side effects are way more drastic than Elavil."