Quotes from the news wire:
What we know about the dangers of this impurity comes primarily from laboratory studies. It is a toxin that can affect the liver and cause liver fibrosis or scarring and liver tumors in rats. So it is assumed to be toxic to humans, as well, in these animal studies, they usually give large quantities, so again, the risk is likely not the same equivalent in humans.
Johns Hopkins Medicine provides some modest reassurance for the short-term, but the absence of a signal for cancer excess isn't really all that surprising to me, because it's just too soon for something like cancer, there hasn't been long enough follow-up to really see a signal. So while I'm reassured that they didn't find one, I don't think it means that patients are completely out of the woods.
There hasn't been long enough follow-up to really see a signal. So while I'm reassured that they didn't find one, I don't think it means that patients are completely out of the woods, now that this study is coming out, I'm going to share it with my patients. I think that many of them are worried, and although this data by no means dispels all fears -- because it's not a long enough follow-up -- I think it will give them at least some short-term reassurance.