I was taking a cluster water product that had some schizandra in it. I took it in the mornings, after about 10 days, I was experiencing very high blood pressure. I discontinued the product and after two weeks I'm still having very high blood pressure, to the point that my fingers feel tight, hot, tingly and heavy. I've had a little high blood pressure like this over the years, but never for an extended period of time like this. Years ago I had a similar experience when taking ginseng, but it went away when I discontinued the ginseng.