Wolfbane Potion

The Wolfbane Potion is a potion used to treat lycanthropy.

Purpose
The Wolfbane Potion does not cure lycanthropy, but temporarily stops it. The potion causes the drinker to assume the form of a wolf, but not become a full werewolf.

In the books
In Harry Potter and the Prisoner of Azkaban, Prof. Remus Lupin uses the Wolfbane Potion.