Carbamazepine
"I have been on Tegretol XR for about 3 weeks now for Trigeminal Neuralgia. I take 100 mg 2x a day. It took like two days for it to work. I only start to have pain from the attacks when I'm due for my next dose. And it's not nearly as bad. The only problem is that I'm already on pregabalin for fibromyalgia, so the Tegretol added makes me totally out of it. I can't remember things, I'm double drowsy all day, I zone out, and I don't like that it has negative interactions with about 500 medications including Tylenol, which I usually take for breakthrough pain because ibuprofen doesn't work on me. So overall, it helps but I really hope I don't have to take this for a long period of time."