###Human: I had some medicines for quick relief of fever. Can this cause dry mouth? ###Assistant: Hi. As such it is not serious but I will tell you there can be some factors responsible for it like drugs Chlorpheniramine which you have taken. Anxiety can cause dryness in the mouth and ulcers are commonly observed in stressed patients particularly females of age group 20 to 30. Morever patient can be diabetic. Now assess yourself if you feel any of these. But so for drugs are concerned it must go after two weeks. Youdo not need to worry. But if you are worried, stressed, then relax. Otherwise, you will feel like that always.