Hi. I had maybe five or six of them over a year's time. As others have reported, at first they were effective, but then they wore off.

That said, there are three very important practice points in this:

1. The fact that one gets some immediate relief is extremely helpful in confirmining a diagnosis of sympathetically maintained pain, e.g. RSD/CRPS;

2. They wear off over time because there's a phase shift in the disease, which is why it's important that they be given early on; and

3. With not a lot of emperical evidence on hand, it's my firm conviction that my relatively early rounds of nerve blocks helped prevent to disease from spreading to the rest of my body.

Mike