What are risks of using peroxyl rinse nightly? Nothing else seems to work for stuff along gumline.

Two weeks. The side effects of prolonged use of peroxyl rinses are staining of the teeth, altered taste, increased tarter formation, and sometimes, mouth and throat ulcers and allergic reactions. We recomend two weeks on and two weeks off. Hopefully a plan can be made to improve your gums and maintain them that does not involve long term use of this rinse.