question: Dear Doctor, I have problems with mouth ulcers. it used to come normally when I am having sputem problems. it means the sputem automically coming in my throught and it will be too white colour also. by the time normally coming this mouth ulcers and my face will be dry too much. what will be do for this. Zenflox 200 antibiotic. one doctor prescribed me. is it ok. what i should do for that