Mutagen Medicine is an invention of Donatello. This liquid is a medicine that was made for Leonardo, which contains Mutagen in it. Mutagen Medicine debuts in Within the Woods.


TV Show

Season 3

Within the Woods




  • The Creep was created and mutated by this substance, since Leonardo vomits.
  • According to Leo, this medicine was no good for him and made him want to vomit it out.
  • A shrine by The Creep was made for the Mutagen Medicine.
    • This references Friday the 13th, because Jason made a shrine of Jason's mom's head.

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