My daughter is 17 years old, weighs 165. Has been diagnosed bipolar, adhd, panic disorder, and has migranes. She takes 900 mg of lithium a day plus topomax 100 mg in the morning and 200 mg in the evening, as well as xanax and an adhd medicine. She has developed a rash on her back that is spreading to her face and front trunk. It itches and kind of looks like an allergic reaction to something. Is it possible that it is a lithium rash? Her levels keep coming back fine. She also has a dry cough at times.