The drug is like an amnesia-inducing version of LSD, except that the initial euphoria leads into channeled aggression, then into a semi-comatose state wherein the victim is constantly thinking about "Fraulein Eule", and then finally into a "blank slate" state upon which both a whole new personality, and new memories, can be crafted and stored. I wonder if Fujiko remembers any past details about her life before she was in the process of being an experimental subject. If so, that would explain Fritz' cryptic comment about how Fujiko was never "born", because her own birth and mind formation was manipulated by Glaucus Pharmaceuticals.
This whole plot reeks of Kenji Eno and Osamu Tezuka having a film-noir bastard child, and yet I love it so much.
Interesting. It does indeed put that comment in a whole new light. Flashbacks of Fujiko's childhood make much more sense now as well. Not that I disliked them, I should say, but the fantastical elements to it finally have some grounding in reality.