Hello! I have been taking Xcopri for almost 5 years now. I began taking it after a craniotomy and removal of what they had hoped was my seizure focus. They got most of it, but due to them not being able to get it all without losing some vision, I elected to stay on meds. Long story, short…I honestly can’t remember what my starting dose was but I was TIRED, even when taking it only at bedtime. I am now at the maximum dose of 400 mg a night. When I tell you, it has been a struggle, oh boy! Despite the fact that I now have to take a different med to stay awake during the day, Xcopri has kept my seizures more controlled than any of the many other meds I have been on. And the drowsiness seems to be the only side effect for me. And most anti-seizure meds pretty much cause drowsiness. Now, as I tell you this, I can also say that my seizures have been less controlled lately. However, my neurologist has been digging into this, and the cause seems to maybe stem more from the surgery than anything else. The Xcopri is still doing its job for the most part