Hi K,
If I may ask what AED's do you take? I know when I was on lamictal I broke out with a rash and my skin itched like crazy. Come to find out I was allergic to the med.
In regards to your upset stomach if you are having sharp pain in the lower right part of your stomach and it goes around to your back you may have a kidney stone or infection. This happened to me when I was taking tegretol xr and trileptal. If you are just getting sharp pains in your stomach every now and then you may have gastro problems from your med. This happened to me a few yrs. ago and the lining of my intestines was eaten up after taking mysoline for over 30 yrs. My Gastro Dr. had me drinking only hot tea no coffee or acidic food/beverages. I also had to stay on a low fat diet and eat a lot of vegetables. If the stomach pain continues I would see a gastro Dr. to be sure it's not your AED causing the problem. Here's wishing you well and May God Bless You!

Sue