The idea is--blessed normal saline, injuected into the vampire slayer before she goes out on her nightly rounds.
After all, if plain holy water can be blessed, why can't you bless normal saline or lactated Ringer's?
Hee-hee! And what kills me is, I've lived my entire life, almost 39 years, and I've never thought of this before. How stupid is that?
The vampire slayer's new credo: "Sure, go ahead. Bite me!" (g)
Aw, they didn't use normal saline; it's some invented drug called Morpheus. Now Faith and Angelus are having a dream sequence together. Oh well.
Saline solution is still a neat idea, though!