given daptacel instead of adacel with no reported adverse event; Initial information received on 30-Dec-2024 regarding an unsolicited valid non-serious case received from a nurse. This case involves a 11 years old male patient who received diphtheria-15/tetanus/5 AC pertussis vaccine [Daptacel] instead of diphtheria-2/tetanus/5 AC pertussis vaccine [Adacel] with no reported adverse event. The patient’s past medical history, medical treatment(s), vaccination(s) and family history were not provided. Concomitant medications included Meningococcal vaccine A/C/Y/W conj (tet tox) (Menquadfi); and HPV vaccine VLP rL1 9v (yeast) (Gardasil 9) both for Immunisation. On 17-Dec-2024, the patient received 0.5 ml of diphtheria-15/tetanus/5 AC pertussis vaccine Suspension for injection with standard strength (expiry date- 30-Sep-2025 and lot 3CA03C3) once via intramuscular route in the left arm as Immunization instead of diphtheria-2/tetanus/5 AC pertussis vaccine Suspension for injection (strength, expiry date and lot number not reported) with no reported adverse event (wrong product administered) (latency- same day). This suspected adverse reaction report is submitted and classified as a medication error solely and exclusively to ensure the marketing authorization holder’s compliance with the requirements set out in the Directive 2001/83/EC and Module VI of the Good Pharmacovigilance Practices. The classification as a medical error is in no way intended, nor should it be interpreted or construed as an allegation or claim made by the marketing authorization holder that any third party has contributed to or is to be held liable for the occurrence of this medication error.