A prescription for medicinal products in lists I and II may not be made for a treatment period of more than twelve months.
However, for public health reasons, in the case of certain medicinal products, psychotropic substances or substances likely to be used for their psychoactive effect, this period may be reduced by decision of the Director General of the Agence nationale de sécurité du médicament et des produits de santé (French National Agency for the Safety of Medicines and Health Products) after consultation with the national councils of the order of physicians and the order of pharmacists.