It didn't click right away for me, but am surprised your Dr started you at 25 mg. My Navy buddy is a big guy & was started at 10 mg daily. He told me just a few days earlier, he had started to use a cane & has been able to go without since starting the Nort, except when he's overdone it & the pain comes back. Not sure when he's going to his Dr, so don't know for sure if he'll be increasing his dose. I'd guess he's been on the N for about 10 days now. I also haven't heard anywhere yet that you build a tolerance to the tricyclics like you do with gabapentin, so I don't know about dose increases down the road.