Dr. Gurudutt: Dr: For the last month or so, off and on, I have suffered from horrible dryness of my mouth, tongue and throat, which causes my throat to feel somewhat swollen. I am taking the following medications: Allegra, Prilosec and Flovent (one puff a day.) I have not taken the Allegra for two days to see if this would help the dryness, but it has not. I do have an infection under a tooth where I had a root canal a few years ago. I finished the antibiotic for the infection about a week and a half ago and still have a slight swelling around the site of the infection. Also, it is dry where I live due to the furnace running, and I have been using a humidifier. I have also tried hard candy to add saliva. Do you have any suggestions that would alleviate what seems to be my excessively dry mouth, tongue and throat?