I found this New Yorker article to explain it well. https://www.newyorker.com/magazine/2025/06/02/the-radical-development-of-an-entirely-new-painkiller https://

I found this New Yorker article to explain it well. https://www.newyorker.com/magazine/2025/06/02/the-radical-development-of-an-entirely-new-painkiller https://www.newyorker.com/magazine/2025/06/02/the-radical-de...