Fun fact, Dr Pepper was sued in the 1950s by a Dr. Clark Pepper, a proctologist from Houston, in an attempt to get them to change their name. His argument was that consumers would assume that he personally endorsed the beverage. The suit was not successful.

Owing to the rules of social decorum at the time, Dr. Clark Pepper was never referred to in court as a proctologist and instead euphemistically called "a specialist in internal matters".