<s>[INST] I have dry mouth from taking WellbutrinXL. I have had sores in my mouth on the right side for the past 10 weeks. I have never smoked or drank alcohol. I had this in November too but 10 days of Keflex cleared it up. I took Keflex again 6 weeks ago and the condition improved but didn t go away. Is it throat cancer? I m a 60 year old female. (My father died at age 58 from toncil cancer but he smoked heavily) Thank you! Tricia [/INST] Hi, Tricia,Wellbutrin is known to cause Chat Doctor. Multiple sores in mouth repeatably might be due to some nutritional deficiency. Keflex is an antibiotic which can help only in case of infection. It will not work in absence of infection. Please GE in tough with your doctor from regular vitamin supplementation which will take care of this current problem. From symptoms, it does not seem to be cancer, but still after examination your doctor can throw more light on it. Bye and take care. </s>