Alright... maybe no one has died from it for the same reason people haven't died from lack of sleep. Because the body and mind will do anything to get the drug. And Vampires can and have died from lack of blood to feed on, but the reason they don't is that their "feral minds" will ultimately take the potion rather than just shut down.

There is a significant portion of people who committed suicide though, and it's happened enough that it's something that slave owners are told to take precautions against.

Is that fair?