What Precautions Need To Be Taken For Gall Bladder Removal Post Brain Tumor Surgery?

My 26 year old daughter has had two brain surgeries. The first was a benign brain tumor removed at age 13 in the occipital lobe that was causing seizures.Tumor removed but still is on 1100 milligrams of Tegretol per day for seizure control. She has been told her gallbladder needs to be removed. What questions should we ask the surgeon regarding her surgery?