Here's an article that I've mentioned earlier, recommending the combination of gabapentin and nortriptyline: http://www.thelancet.com/journals/la...081-3/abstract

I too have found that the side effects from nortriptyline decreased over time and that it took a while for the pain-relieving effects to start. In fact, the first few days that I was on the entry dose of 10mg, I thought my PN pain INCREASED. The benefits didn't really begin till I'd ramped up to about 30 mg.