Received Aug 19, 2025
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| MMR | MEASLES + MUMPS + RUBELLA (MMR II) | MERCK & CO. INC. | 1 | Y018703 | — |
| MMR | MEASLES + MUMPS + RUBELLA (MMR II) | MERCK & CO. INC. | 1 | Y018703 | — |
| MMRV | MEASLES + MUMPS + RUBELLA + VARICELLA (PROQUAD) | MERCK & CO. INC. | UNK | Z005153 | — |
| VARCEL | VARICELLA (VARIVAX) | MERCK & CO. INC. | 1 | — | — |
No additional AE; HCP calling to report the inadvertent administration of PROQUAD and MMR-II for two patients today (07/25/25). Both patients have already received their first dose of VARIVAX and MMR-II. The 14-month-old patient for this case received their first dose; The 14-month-old patient for this case received their first doses on 05/29/25 for both vaccines. HCP calling to report the inadvertent administration of PROQUAD and MMR-II for two patients today (07/25/25).; Information has been received from registered nurse on 25-Jul-2025 and refers to 14-months-old patient of unknown gender. The patient's medical history, concurrent conditions, concomitant therapies, past drug reactions and allergies were not reported On 29-May-2025, the patient was vaccinated with the first dose of Measles, Mumps, and Rubella (Wistar RA 27-3) Virus Vaccine, Live (M-M-R II), (valid lot #Y018703, expiration date: 11-Nov-2026) for prophylaxis and with 29-May-2025, the patient was vaccinated with the first dose of Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX), (lot # and expiration date were not reported), which were both reconstituted with sterile diluent (MERCK STERILE DILUENT) (lot number and expiration date not provided). On 25-Jul-2025, the patient was vaccinated with the second dose of Measles, Mumps, and Rubella (Wistar RA 27-3) Virus Vaccine, Live (M-M-R II), (valid lot #Y018703, expiration date: 11-Nov-2026), dose and with Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD), (valid lot #Z005153, expiration date: 25-Aug-2026), which were both reconstituted with sterile diluent (MERCK STERILE DILUENT) (lot number and expiration date not provided). The administered vaccines were giving inadvertently on the same date (Accidental overdose and inappropriate schedule of product administered). The patient was no symptomatic and no additional adverse event was reported. No other information provided. This is one of two reports from the same reporter.
Sterile diluent