A famously strange piece of Beverly Hills Cop lore comes from producer Don Simpson, who told friends that he had devised an unusual way to get Sylvester Stallone off the picture after the studio rejected Stallone's radical action-oriented rewrite. Simpson allegedly knew of a Swiss doctor experimenting with injections of sheep hormone that supposedly increased sexual potency. According to Simpson's story, he arranged for Stallone's name to be placed at the top of an exclusive waiting list, prompting the actor to fly to Switzerland for the appointment. Simpson then supposedly used Stallone's absence to move ahead with the Eddie Murphy version of the film.
The anecdote fits the bizarre, hyperbolic mythology surrounding Simpson, a producer known for extravagant behavior and sensational stories, but it has never been independently corroborated. The documented record is considerably less lurid: Stallone left the project shortly before filming, officially citing his commitment to Rhinestone, while Murphy was recruited almost immediately and the screenplay was rapidly reshaped around him. The sheep-hormone episode therefore survives as an unverified Hollywood tall tale rather than established production history. Its one solid historical consequence is that Stallone's discarded concepts did not disappear; many were repurposed for Cobra, released two years later.
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