Praying this one works........20 years ago one of the nursing homes I worked inused this a lot and had really good results. It probably was just out and lots of shiny ads out. As I'm writing this I'm remembering that I was put on it during those same times for a massive sinus infections that would not clear and had gone on for 2 months. Like Steve I was told if this didn't work I'd need IV antibiotics but it worked. If I remember right it did make things taste weird but that might have been another in the series we tried with that infection.