Some time ago, perhaps the beginning of 2014 or thereabouts, Biotene changed the formula of this product. I used to swear by it for solving dry mouth problems overnight where long-term efficacy was required. However, the "NEW! PH-balanced formula" has been watered down so that its effectiveness longevity has been severely compromised. In addition, the new formula has a very caustic or acidic edge; inevitably one is going to have to swallow some of this goo during use, and in my case (and many others’ -- read the reviews on Amazon and on Biotene's web site) the formulation provides a very unpleasant throat-burning experience for a good 20-minutes after it is applied, which certainly doesn't help one get to sleep! This new product seems about as far from "pH-balanced" as you can get. The only reason I buy this product anymore is because it's the only real player in the game for relief that lasts longer than a couple of hours, and because I can still blend it with the contents of some travel packs of the old gel that I still have and have found more of online. After that stash runs out, I don't know what I will do. I guess I'm hoping Biotene realizes they made a huge "Coca-Cola reformulation" error and restores the old formula -- or at least remedies the horrible caustic edge this formulation suffers from. Wal-Mart does have the best pricing I have been able to find to date (another problem with this product -- it's ridiculously expensive -- prior to the reformulation you could buy it for $3.99 / tube).
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