Background: In the history of medicine, unexpected coincidences indicated the development of new treatment options.
Objective: One of the most peculiar ones concerns the finding of botulinum toxin, and this should be familiar to physicians using the drug.
Methods: A survey through the history of the "fat-poison" has been performed.
Result: A poison turned to one of the most popular drugs in aesthetic medicine.
Conclusion: Depending on the dose, a substance may be poisonous or not.
© 2011 The International Society of Dermatology.