From certain cloistered old authors I have gathered that this same sea-unicorn’s horn was in ancient days regarded as the great antidote against poison, and as such, preparations of it brought immense prices.
There are no more uses of "antidote" in the book.
Show samples from other sources
Yeah, an antidote to the stupidity of dating.
Laurie Halse Anderson -- The Impossible Knife of Memory
But Andie was no longer the antidote to my nerves.