Lucky Luke - Volume 38 - Doc doxey's elixir

In this early adventure of the famous cowboy, Lucky Luke is dealing with one
of the plagues of the Old West: quacks. “Doctor” Doxey is a con man, a
charlatan who brews up useless elixirs and sells them as miracle cures for
every ailment known to man. But he doesn’t stop at that and occasionally
causes illnesses himself, the better to cure them—a behaviour that does not
sit well with Luke...