Yes, although, you could just poison and kill anyone as easily already now, so I'm not sure if it's exactly more terrifying or not.
https://en.wikipedia.org/wiki/Scopolamine#Use_in_crime
The estimate of 50k criminal cases involving scopolamine in Columbia makes it sound mainstream.
Nevertheless: > [...] on the World Health Organization's List of Essential Medicines.
Well I don't know. But having tried drugs like Ambien which is a prescribed sleep medicine and it kind of completely removing all filters far, far more than alcohol would when not going to sleep immediately after and then not remembering anything the next day at all I found it plausible for there to exist really scary drugs like that, which would congitively affect you and your personality.