Circe's Potion

Circe's potion is a magic drink used by Circe that turns the drinker (usually male)into a guinea pig. It used to turn the drinker into a real pig, but they were too hard to handle. It can be countered by Hermes' multivitamins. This is a reference to the original myth, where Circe lulls Odysseus' crew into a stupor with food and drink, and then turns them into pigs.