For what it's worth, 'amnestic' is a real class of drugs (https://en.wikipedia.org/wiki/Drug-induced_amnesia https://en.wikipedia.org/wiki/Drug-induced_amnesia)

For what it's worth, 'amnestic' is a real class of drugs (https://en.wikipedia.org/wiki/Drug-induced_amnesia https://en.wikipedia.org/wiki/Drug-induced_amnesia), although, as far as I know, they only prevent the formation of future memories, rather than erasing past ones. I've always found it deeply creepy that I once had a painful surgical procedure in which I experienced the pain, but I can't remember it.