Received Oct 7, 2025
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| HPV9 | HPV (GARDASIL 9) | MERCK & CO. INC. | UNK | Y015180 | — |
| HPV9 | HPV (GARDASIL 9) | MERCK & CO. INC. | UNK | Z007940 | — |
| VARCEL | VARICELLA (VARIVAX) | MERCK & CO. INC. | UNK | Z005232 | — |
No reported side effects/symptoms from the patient at time of call. No additional AE details provided. No additional AE reported.; Caller reports this occurred due to her removing the label from the GARDASIL 9 and then when she went to reconstitute the VARIVAX she had forgotten that she had done this and grabbed it because she thought it was diluent.; Inbound call from medical assistant who reports she inadvertently administered VARIVAX that was reconstituted with GARDASIL 9 instead of diluent to a patient. She also administered an additional dose GARDASIL 9 to this patient.; Caller reports this occurred due to her removing the label from the GARDASIL 9 and then when she went to reconstitute the VARIVAX she had forgotten that she had done this and grabbed it because she thought it was diluent.; This spontaneous report was received from a medical assistant and refers to a patient of unknown age and gender. The patient's medical history was not reported. The patient's concurrent conditions were not reported. Concomitant therapies were not reported. On 16-Sep-2025, the reporter inadvertently administered the varicella virus vaccine live (Oka-Merck) (VARIVAX) (lot #Z005232, expiration date: 27-Feb-2027) that was reconstituted with human papillomavirus 9-valent vaccine, recombinant (GARDASIL 9) (lot #Y015180, expiration date: 28-Jan-2027) instead of diluent to the patient. She also administered an additional dose human papillomavirus 9-valent vaccine, recombinant (GARDASIL 9) (lot #Z007940, expiration date: 05-Mar-2026) to this patient (Accidental overdose). This occurred due to her removing the label from the human papillomavirus 9-valent vaccine, recombinant (GARDASIL 9), and then when she went to reconstitute the varicella virus vaccine live (Oka-Merck) (VARIVAX) she had forgotten that she had done this and grabbed it because she thought it was diluent (Product preparation issue). No reported side effects/symptoms from the patient at time of call as patient has left the office and medical assistant realized after (No adverse event).