Hydrogen oxide is the biggest killer on the planet and you hear nothing about it. WAKE UP!
So THAT'S why they're not giving any of this to Terri Schiavo. They're actually trying to save her! (/sarcasm>
I believe you are referring to DiHydrogenOxide or dihydrogen monoxide.
Yes, extremely dangerous. Free Republic devoted a full thread to this at least once.
Don't you mean Hydrogen hydroxide or DiHydrogen Monoxide? Inhale even small amounts of it in its liquid form and it will kill you. It causes severe tissue damage in either its gaseous or solid forms.