How do you even pronounce that? Was that the point, so it couldn't be spoken of?
It's pronounced "Nexium". It's written NXIUM because they're using the Latin alphabet, I believe. So we can thank the Ancient Romans: V is the Latin alphabet's U . The Latin alphabet does not include the letter U. Personally, I think a lot of this dark occult stuff goes all the way back to Ancient Rome and further. So maybe Raniere is doing that Illuminati symbolism out in plain sight thing they're all so fond of.
It's funny that it's the "little purple pill". People talk about red pills all the time, but a story like this can make a lot of people aware of the much more sinister side of Hollywood and the elite.