OK so for the longest time I thought this was the villain from Big Trouble in Little China, b/c he had this parasitic quality to him (old man drained energy from young girl to maintain himself), but that's not it. I distinctly remember a scene with numerous people, maybe all women maybe not, being physically drained of a yellowish fluid (implication that its plasma, not blood?), by some villain.* I had somehow confused this with Phantasm as well, but that's not even thematically related - although related by timeframe. This aired on UPN (guessing) in the Chicago area in early/mid-90s. Was probably released in the 80's. Thx!
- Oh yah, so the plasma was being drained mechanically, into IV bags, not directly with fangs or something. That was one of the things that stood out about it, the creepily pseudo-medical nature.