No, it doesn't.
If the drugs were taken willfully, you are culpable of disconnecting your will from any actions that happen, whether they happen to you, or whether you are the actor. If you are unwittingly drugged, what was the situation? Did you go into someone's apartment lair who you knew wanted more from you than a casual relationship? Did he offer you a drink there? Why would you accept from such a person?
There are a LOT of decisions a "victim" makes leading up to the final crime. Don't discount that.
Are they any indications that the victims willingly took drugs to incapacitate themselves to the point of erasing their memory of events after ingestion. “Yeah sure, Cos, I’ll take that roofie while you whip out Fat Albert.”
I don’t understand why people think women should take responsibility to avoid situations where they might be raped but the guys don’t have to take responsibility for avoiding potential blackmail when offered the chance to get their rocks off.