[en] After an indication of data illustrating the number of significant events in radiation protection in nuclear medicine, this publication discusses the occurrence of events related to the administration of radio-pharmaceutical medications: errors related to the medication circuit, or to the patient course. It synthetically defines good practices of pharmaceutical validation, of preparation of radio-pharmaceutical medications, of communication between team's professionals, of training of healthcare teams, and of administration of the radio-pharmaceutical medications. It briefly presents the innovative initiative of the Martinique CHU with the introduction of a bar code to secure the medication circuit. Members of the Albi hospital report their experience of problems and of their correction