I have PoTs and with that diagnosis and my first severe flare, I got intense dry mouth and dysphasia. I had never used Biotene before, but these products were instrumental in keeping me comfortable and improving the moisture in my mouth so I could take my medication comfortably. It is super easy to use, just brush your teeth and use a small amount to swish around your mouth, spit it out and you are good to go. It instantly hydrates the mouth and makes the chalky dryness go away. It also lasts a good amount of time. I use this everyday.