From what I understand, the premise of using NO to treat tendons is very different than NSAIs. One, it dilates the blood vessels so that whatever minimal blood vessels are present in the tendons receive more blood flow, and two, it attracts fibroblast cells to the area which are responsible for the creation of new collagen fibers. It's a transdermal patch that works locally and not globally.
Anyway, it's interesting to me that more people don't know about it, given just how cheap it is... (~$40 for a 3+ month's supply). The problem was that the only doc I knew who prescribed it was halfway around the country, so prescription + plane tickets was a bit more than $40!
Don't get me wrong though, it was worth its weight in gold!