Emergency trauma departments receive thousands of patients each year whose main symptom is pain. In recent years, intranasal fentanyl (FIN) has entered the therapeutic arsenal to treat pain in the emergency department. Various studies have validated its effectiveness for musculoskeletal pain as well as its tolerance and safety of use. Since then, new protocols have been implemented including this treatment. In This study, the investigators propose to retrospectively study the quality of prescription of intranasal fentanyl in the treatment of pain in the emergency department and the quality of monitoring of this treatment in current practice.

Inclusion Criteria:

• Child < 18 years old
• Child treated in the pediatric emergency department of Strasbourg University Hospital
• Child who has benefited from intranasal fentanyl between 08/01/2022 and 09/31/2024.
• Child (and/or his/her parental authority) who has not expressed, after information, his/her (their) opposition to the reuse of his/her health data for the purposes of this research.

Exclusion Criteria:

• Refusal of the child (and/or his/her parent) to participate in the study
• Patient's medical file not incomplete
• Child not domiciled in France.

Child < 18 years old who has benefited from intranasal fentanyl between 08/01/2022 and 09/31/2024.