Wolfsbane

shot, during a confrontation with Jackson Whittemore, Derek loses control and begins to shift. He gouges deep claw marks in Jackson’s neck.

Derek cures his infection by removing the wolfsbane tip from another bullet, crushing and burning the bullets contents and then pressing the still hot remains deep into the wound. The effect is almost immediate with all trace of the infection and the bullet wound gone in less than a minute.

In The Tell, while not specifically mentioned, evidence of wolfsbane appears in the scratches Derek left on Jackson’s neck.

When the Alpha gets close to Jackson in the Video 2*C the cuts on Jackson’s neck glow faintly blue and purple much like the spiral formation around Laura’s grave and Derek’s bullet wound. This suggests Derek may have passed his wolfsbane poisoning on to a human. It could also explain why the Alpha left Jackson alive since it too would be susceptible to the poison and possible death.