Kellie, I tried Salagen for a few weeks and got no noticeable difference in my saliva, so I discontinued using it. This was a month or so after treatment ended. The phlegm and gagging is a normal thing after radiation. I had it for about 3 weeks after and then it just stopped in a few days. Sleep sitting up and eventually she will stop getting up every hour to cough and gag and spit it out. Good luck and will pray for her getting over this with your help.