
The potion helps keeping the wolf at bay, but werewolves still require having the will and the strength to fight the wolf.

It must only be administered to werewolves, or it would poison the person. The fire slugs must be heated before being mashed, which results in a significantly higher potency. In his breakthrough of the summer of 1993, Severus Snape manages to reduce the brewing time by a full 15 minutes, and provides several alternate instructions for ingredient preparation. The stasis charms on the vials must be strong to keep the potion at its freshest for the full moon, as it spoils very quickly. The brewing process and the majority of its ingredients are extremely similar to Aconite Alleviation. (This is one of the reason for its expensive price.) The imbued magic helps to sooth the potion, holding reactive ingredients together safely. It requires a considerable magical strength to brew the potion, meaning that the average person would have a hard time brewing it. It is difficult to brew and time-consuming. The New Wolfsbane acts as a sedative, making the wolf extremely docile and sleepy, so the werewolves have to find a secure place before transforming, as their ability to defend themselves is reduced. Some ingredients are influenced by the cycle of the moon, which make the side effects stronger during the night and weaker during the day.

It also lessens the pain of transformation by an average of sixty percent, and significantly decreases tiredness, nausea, and irritability.

If taken before the sun set on the first night of the full moon, it would remain potent for all three nights of potential transformation. It calms werewolves during their transformation, making them more docile.Įven on Wolfsbane, it is difficult for a werewolf to resist their instincts to chase or slay something pure, like a unicorn.
