Well - this is kind of embarassing to admit, but I also have underlying panic disorder (which I guess doesn't help with my hypertension). Anyway, I used it for about a week and felt pretty good - but noticed I was getting more frequent and severe panic attacks. I thought maybe it was linked to the difference in my breathing from the Resperate. You would have thought it would have done the opposite - but I am kind of strange like that. So I guess maybe it was going to work but I quit due to my anxiety. Now that I am adjusting to my new hypertension meds I will try to start again. I will definitely let everyone know. I am currently trying to stuff myself with 4 celery stalks a day since I have read that can lower your blood pressure as well. I will try anything to avoid having to add a 3rd blood pressure med to my regimen.