Received Mar 12, 2026
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| MMRV | MEASLES + MUMPS + RUBELLA + VARICELLA (PROQUAD) | MERCK & CO. INC. | UNK | — | — |
| VARCEL | VARICELLA (VARIVAX) | MERCK & CO. INC. | UNK | — | — |
No additional AE reported; She states she inadvertently administered PROQUAD and VARIVAX at the same time today (2/20/2026) instead of MMR II and VARIVAX to a 42-year-old Male; She states she inadvertently administered PROQUAD and VARIVAX at the same time today (2/20/2026) instead of MMR II and VARIVAX to a 42-year-old Male; She states she inadvertently administered PROQUAD and VARIVAX at the same time today (2/20/2026) instead of MMR II and VARIVAX to a 42-year-old Male; This spontaneous report was received from a Medical Assistant and refers to a 42-year-old male patient. The patient's medical history was not reported. The patient's concurrent conditions were not reported. Concomitant therapies were not reported. On 20-Feb-2026, the patient was vaccinated inadvertently with Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD) solution for injection, administered as prophylaxis (refused to answer/refused to answer) (lot # and expiration date were not reported); and with Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX) solution for injection, administered as prophylaxis (refused to answer/refused to answer) (lot # and expiration date were not reported), instead of Measles, Mumps, and Rubella (Wistar RA 27-3) Virus Vaccine, Live (MMR-II) solution for injection and Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX) (Accidental overdose, Wrong product administered, Product administered to patient of inappropriate age). No additional adverse events. The vaccine was reconstituted with sterile diluent (lot # and expiry date were not provided)). At the reporting time, the outcome of the events was unknown. The action taken with the suspect vaccines was not applicable.
DILUENT MRK