This was the first film ever to be rated X by the MPAA based on violence alone.
David Durston originally entitled the film "Phobia," however the distributors felt the film needed to be a double-feature. An ad executive came up with the promotion of a double feature of films called "I Drink Your Blood" and "I Eat Your Skin." This is how Durston's film came to be named "I Drink Your Blood" despite the fact that no one ever drinks blood in the film.
According to director David E. Durston, when the film was originally given an "X" rating by the MPAA, theaters threatened to pull the film entirely. The distribution company then granted the theaters permission to edit the film themselves as long as they would still attempt to show it. As a result of this agreement, Durston says there were hundreds of different "versions" of the film due to individual theaters editing their own reels of I Drink Your Blood.
According to Durston, apart from the chicken in the opening scene, no animals were killed in the making of the film.
The satanic practices of the cult were based upon actual satanic rituals told to David E. Durston by a friend that was a former member of a cult.