The principle of " one man one shop " is general; a pharmacist may not own more than one shop in the same town.
1233 passed a law, which remained in force for a long time in the two Sicilies, by which every medical man was required to give information against any pharmacist who should sell bad medicine.
In France, Switzerland, Belgium and Holland the number is not limited, and every qualified pharmacist has the right to open a shop or buy a pharmacy.
The original prescription is kept by the pharmacist for either three or ten years, according to the country, and a certified copy given to the patient, written on white paper if for internal use, or on coloured paper (usually orange yellow) if for external use.
They are not allowed to prescribe, nor the medical men to dispense, except under special licence, and then only in small villages, where the pharmacist could not make a living.