[The implementation of the eight-hour working day in Spanish pharmacies, 1904-1936]

This is a study about the implementation of the eight-hour day (1919) in Spanish pharmacy offices and the legislative antecedents that led to it: the Sunday rest law and the law regulating commercial dependency. These health establishments were contemplated in some of the exceptional situations that marked these provisions, which were different depending on whether the worker was "external" or was part of the "internship" system. The article also collects and analyzes the points of view of pharmacists and auxiliaries, that is, employers and workers, through the most prominent professional press, which represented the conflicting interests of these professionals.