Hematophage

Hematophage is a Fallout 3 special perk. It can only be gained through the Blood Ties quest.

Effects
Blood packs heal 20 Hit Points instead of only 1.

Obtaining
This perk can be obtained by convincing Vance to enter into a deal with the town of Arefu by passing a Speech check, a Medicine skill check or an Intelligence check after the Blood Ties quest. Then, by returning to Vance and asking to be shown the ways of the vampire.

Behind the scenes

 * Hematophagy is a real world descriptor of animals who feed on blood.
 * Its Pip-Boy icon is a reference to the character Dracula.