> "After seeing the results for x years of use by populations, we found that it has y side effect which was not known earlier" I would think that any reasonabl

> "After seeing the results for x years of use by populations, we found that it has y side effect which was not known earlier" I would think that any reasonably intelligent adult could think about things for a few moments and come to the realization that... yeah, that's how things work. This is how we progress and learn. We develop, test, use, and learn about things - and if we learn that hey, turns out, this is bad over a long period of time... we change things. And this of course doesn't apply to just medicine - it's just technological progress.