Stan Lee‘s former business associate is like a vampire … he literally sucked the blood out of Stan’s body — well, not exactly literally, but close.

Here’s what we’re told. The businessman went to Stan’s personal nurse back in October with a forged document giving him authority to order a blood sample from the Marvel maven. Our sources claim he told the nurse to fill several vials and she obliged. We’re told she took so much Stan became dizzy.

No one from Stan’s camp had…