The living forces, according to Leibnitz (17th century), are those forces that produce movement and change in the face of dead forces, which do not produce it. Subsequently, this same expression was applied to the influential people of a place that act for the benefit of the same: the mayor, the teacher, the priest and the apothecary were the living forces in the towns and neighborhoods of eighteenth-century cities. Their opinions were considered and often blindly accepted by the community. In this work we try to see what was the position of the apothecary of the XVIII before the Inquisition and the Catholic faith and the influence of the Enlightenment in this position.