I need help naming a gas used in the lore of a series. It causes hallucinations and shatters one concept of reality, causing them to go insane. It’s used by a corrupt asylum who uses the gas to have more patients at once and therefore get more funding. It’s possible to be rehabilitated from the gas if you’ve only been being given dosages for the past 2 weeks. Any longer and your mental psyche is destroyed permanently making you psychotic