The only decent sex-type scene is with Amanda Phillips solo. She manages to be more erotic with her clothes on (although how erotic can the drug be if you keep your clothes on after taking it?), then the other actresses who go topless. However, she doesn't seem to be hopelessly addicted. Phillips has some talent throughout, doing an amusing Renfield impersonation at some points, and conveying the paranoia of the drug in others. Hopefully she'll move on to bigger and better things.
The other actors are execrable. Todd Swift is the worst example, coming across as a poor man's Jake Busey. His character Matt has no redeeming social value whatsoever: moving in with his "friend" Tuesday (how that comes about is never explained), slipping her a drug, leaving her with the tab for delivery pizza, and casually blowing off the deaths of two of his friends. However, nobody else is any better, Ms. Phillips excepted. Swift just gets more screen time.
Plot holes abound. Tuesday apparently kills two of her friends, somehow tracking them several miles as they're driving in a car and passing over hundreds of other potential prey. As noted, the sex drug only seems to cause ecstasy for about 30 seconds. The zombie- victims go from bouts of insanity to perfect lucidity. Some of the zombie-vampires wear masks, which prevent them from actually biting people.
The movie also provides a near-perfect example of Chekhov's smoking gun maxim: the guys find a functional gun in an abandoned house for no particular reason, and you know they're going to end up using it later.
And despite their relatively short run time, the movie is hopelessly padded with scenes of people walking... and walking... and walking... and staring off into the dark trying to see something. And then more walking.
Production values are non-existent, and the flashback historical sequences seem to have been mounted by dropouts from the local SCA group.
Really not much to recommend for this one other then Scene 6, but you can watch for the unintentional camp value.