I successfully completed treatment of Base of Tongue-Right side cancer in September 2006 with still no major problems. I did fall into the small percentage of patients developing ORN. Because of that issue I underwent a total of 40 two hour dives in the single hyperbaric chamber at Emory University Hospital in Atlanta. I still visit the Emory Oral Surgery Dept annually for a checkup which they recommend for my remaining life. Now, getting to the point, one of the most aggravating issues I am bothered by is extreme dry mouth, most commonly in the middle of the night. I have been using the Biotene gel product and have been purchasing via Amazon at a price of around $6.50 per tube. I would always buy at least 3 tubes at a time but now it seems that even Amazon no longer has the product. I have been trying to order for over a month now and get an "out of stock" response. I have checked other sites on the internet but it seems that no one has it. Does anyone know if it has been discontinued or any other reasons it is unavailable?