administration of only the liquid DTAP-IPV portion of PENTACEL, the dose administered did not include the ACTHIB portion with no reported adverse event; Initial information received on 14-Jan-2025 regarding an unsolicited non-valid non-serious case received from a other health professional. This case involves, the unknown age and gender patient who was administration of only the liquid DTAP-IPV portion of Diphtheria/Tetanus/5 Hybrid Ac Pertussis/IPV(Vero)/HIB(PRP/T) Vaccine [Pentacel], the dose administered did not include the ACT HIB portion with no reported adverse. The patient’s past medical history, medical treatment(s), vaccination(s) and family history were not provided. On an unknown date, the patient administration of only the liquid DTAP-IPV portion of Diphtheria/Tetanus/5 Hybrid Ac Pertussis/IPV(Vero)/HIB(PRP/T) Vaccine (lot UK043AA, expiry date: 31-Aug-2025), the dose administered did not include the ACT HIB portion with no reported adverse event (single component of a two-component product administered) (unknown latency). Reportedly, Caller did not have specific details or patient specific information available at the time of the call. No other details were available in regards to this situation. 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.