I am sorry, I could not respond earlier. It worked almost immediately. Everyone is different. The other one i was on was Topomax, but it also affected my kidneys. You have to drink a lot of water with these meds. Topomax was excellent.
I only take 125mg/day. The dose is 125/2X Day. I don't know what your dose is. I am confident you will feel better on this, but in the unlikely event, you don't, there are other options.