Received Feb 9, 2026
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| MMR | MEASLES + MUMPS + RUBELLA (PRIORIX) | GLAXOSMITHKLINE BIOLOGICALS | UNK | — | — |
Active ingredient not added to diluent.; Active ingredient not added to diluent.; This non-serious case was reported by a pharmacist via call center representative and described the occurrence of inappropriate preparation of medication in a patient who received MMR (Priorix) for prophylaxis. On 31-JAN-2026, the patient received Priorix. On 31-JAN-2026, an unknown time after receiving Priorix, the patient experienced inappropriate preparation of medication (Verbatim: Active ingredient not added to diluent.) and inappropriate dose of vaccine administered (Verbatim: Active ingredient not added to diluent.). The outcome of the inappropriate preparation of medication and inappropriate dose of vaccine administered were not applicable. This report is made by GSK without prejudice and does not imply any admission or liability for the incident or its consequences. Additional Information: GSK Receipt Date:04-FEB-2026 The pharmacist called to request a replacement for the diluent of Priorix. They administered only the diluent portion of Priorix to a patient by accident. The reporter did not provide the patient initials, age, gender and the vaccine lot number and the expiration date. No further information was expected. The batch number was not provided and unable to contact the reporter.