Hi Lou,
I did have the Regennex stem cell injections five years ago. It went very badly, and I had my hip resurfaced a little over six weeks later.
They said that my reaction to the injections was very unusual. I had walked with a fairly bad limp before the injections, though I was still very active in my sport careers like skiing and windsurfing. After the injections, I was unable to get around at all without crutches, and could not even get into a pool without getting severe pain whenever I moved my leg. This continued to get worse and worse for six weeks after the injections, which is when I decided to go for the resurfacing, which has worked out very well.
I did feel that there a few things in my case that were handled very poorly by Regennex. In fairness, they did say that my case was borderline in terms of whether the treatment would help, and that my reaction was very unusual.
If you would like more details about my unhappy experience, send me PM on this site, and I will forward more details of my experience.
John