This is why I have brain fog. I guess it can vary from one patient to the next. But, it isn't from inflammation of the brain in my case. He placed me on Xifaxan to help break down the ammonia & other toxin. Due to the expense of this medication my insurance does not want to pay for it. Now I am being placed on something called lactulose so I will have multiple bowel movements daily. I also suffer from ulcerative colitis & already have three to four bm's daily, usually before noon😒. Not sure how well this is going to go, but we will find out I guess.