Wolfsbane Potion
From Hpwiki
The Wolfsbane Potion is a potion that allows a transformed werewolf remain rational during a full moon.
Hogwarts Potions Professor Severus Snape brews the potion during Harry's third year for Remus Lupin. In the sixth year, we discover that Marcus Belby's uncle Damocles invented the complex potion.
Wolfsbane Potion must be taken during the entire week of the full moon, once a night, in order to be effective.
