Board Thread:Legitimate Canon Questions/@comment-24108335-20150902132014/@comment-4091815-20150902194852

We've seen a couple of different methods. The first wolfsbane poisioning case was in Magic Bullet Derrek needed a sample of the actual species in order to cure it.

Since then we've seen Scott poisoned by Victoria Argent in Season 3 but there was no "cure" shown.

In Season 4 wolfsbane was used by The Mute against Peter. In that case Derek burned the wound with a blowtorch to remove the wolfsbane. Then we saw the yellow wolfsbane poisoning which was cured by cutting into the victims' chests. There doesn't appear to be a single method for a cure.