Received Mar 5, 2026
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| MMRV | MEASLES + MUMPS + RUBELLA + VARICELLA (PROQUAD) | MERCK & CO. INC. | UNK | Z008587 | — |
| VARCEL | VARICELLA (VARIVAX) | MERCK & CO. INC. | UNK | Z009470 | — |
No symptoms reported. No additional AE/no PQC.; HCP who is an HBP reported a medication error for the inadvertent administration of PROQUAD concomitantly with VARIVAX. HBP reported that the patient was supposed to get VARIVAX and MMR II but received PROQUAD instead of MMR II with VARIVAX.; HCP who is an HBP reported a medication error for the inadvertent administration of PROQUAD concomitantly with VARIVAX. HBP reported that the patient was supposed to get VARIVAX and MMR II but received PROQUAD instead of MMR II with VARIVAX.; This spontaneous report was received from a consumer or other non health professional and refers to a 3-year-old patient of unknown gender. The patient's medical history, concurrent conditions and concomitant therapies were not reported. On 04-Mar-2026, the patient was vaccinated with Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX), (lot #Z009470 with expiration date not reported but upon internal review established as 27-May-2027) 0.5 mL (route of administration and vaccination site were not reported) reconstituted with sterile diluent, solution for injection (lot # and expiration date were not reported); and with Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD) (lot #Z008587 with expiration date not reported but upon internal review established as 04-Nov-2026) 0.5 mL (route of administration and vaccination site were not reported). The vaccines were administered for prophylaxis. On 04-Mar-2026, a medication error for the inadvertent administration of Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD) concomitantly with Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX) (overdose). The patient was supposed to get Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX) and Measles, Mumps, and Rubella (Wistar RA 27-3) Virus Vaccine, Live (M-M-R II) but received Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD) instead of Measles, Mumps, and Rubella (Wistar RA 27-3) Virus Vaccine, Live (M-M-R II) with Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX) (wrong product administered). The patient was behind on his vaccines. No symptoms were reported. No additional adverse event (AE) and no product quality complaint (PQC) was reported (no adverse event).
DILUENT MRK