Promising Results
So take a look at the stories you’re reading on the drug: if they mention this issue, good. If they just talk about what a promising drug for breast cancer palbociclib is, then that reporter (and that news outlet) is not providing the full story.
This is why I don’t waste time reading news stories about “promising results” for any technology. The problem isn’t specific to pharmaceuticals, it’s specific to news outlets. Everything is just a human interest story salivating for cheap clicks.
I’m generally skeptical, but any story about promising early results or breakthrough anything is almost always just dishonest writing.