Opium is supposed to be pure evil -- even though it's been used responsibly for millennia overseas. Besides, it's a threat to Big Liquor so we have to burn it, whether the locals mind or not. That said, opium is on record as having effectively cured the common cold and all sorts of other irritations. So the next time someone asks, "Why isn't there a cure for the common cold?" You tell them, "There is, but anti-scientific drug warriors won't let us use it."