I only took 3 doses & felt insane by the 2nd. Once I took the 3rd , it confirmed for me that it was the Advair & not the antibiotic I was also on. Horrible nightmares, confusion, disorientation, intense dizziness lasting 13 hours, nausea, a complete surreal feeling, and major depression accompanied wild jitters, and an overall creepiness I have never experienced. I also felt partially deaf as if I had overdosed on aspirin. I have not seen any others w/similar side affects, but I thought I would include mine anyway in case someone else reacts the same way. I will never use this product again.