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Wolfsbane Potion is a recently (around 1990) invented potion that, if taken periodically during the week leading up to the full moon, allows a werewolf to retain his or her mindset and sanity, when he/she transforms into a werewolf during the full moon.

It is described as a foul-tasting potion - sugar makes it useless - and is so difficult to make that Severus Snape is the only member of the Hogwarts staff capable of preparing the potion for Remus Lupin, who requires regular doses to control himself when he transforms into a werewolf.

The potion was invented by Marcus Belby's Uncle Damocles. Damocles was taught Potions in Hogwarts by Horace Slughorn. It is not known whether the Wolfsbane Potion is made from any part of the plant called wolfsbane.