The term "medicinal" is taken from the language of the late 19th century when soaps were mainly created and sold by pharmacists. These, through the contribution of therapeutic ingredients, have brought to the function of general cleaning and hygiene other medicinal functions. Medicinal soaps remained in the apex of pharmacists until the industrialization of soap, somewhere between the two world wars. The experience of more than a century in application is the most correct proof of the declared functions.