Rexall, What does it stand for ?

Question

I see the name REXALL thats associated with drug stores. Is it only certain stores that are with that name or is it "Drug Stores" in general

Answer 1

excerpt from the book...The original group chose the name “Saxona” for their products-to be,
but W. T.Wilson, Liggett’s “office boy,” suggested an alternative:
Rexall—“king” of all. Brilliant! Of course, any pharmacist also knows that Rx stands for prescription. Thus, the name suggested two
meanings, both of them very marketable.