Received Sep 18, 2025
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| UNK | VACCINE NOT SPECIFIED (NO BRAND NAME) | UNKNOWN MANUFACTURER | UNK | — | — |
potential interaction between the Pfizer COVID-19 vaccine and an antibiotic, levofloxacin.; This is a spontaneous report received from a Consumer or other non HCP from medical information team, Program ID. A male patient received BNT162b2 omicron (lp.8.1) (COMIRNATY (2025-2026 FORMULA)), as dose 1, single (Batch/Lot number: unknown) for covid-19 immunisation; levofloxacin (LEVOFLOXACIN), for infection. The patient's relevant medical history and concomitant medications were not reported. The following information was reported: DRUG INTERACTION (non-serious), outcome "unknown", described as "potential interaction between the Pfizer COVID-19 vaccine and an antibiotic, levofloxacin.". The action taken for levofloxacin was unknown. Additional information: Caller questioned that he have another question and that always has been fine in the past, but he have Alpha-gal, which is allergy to mammalian and previously when he contacted Pfizer, they said that there were not animal or mammalian products in the product and that was fine. he assuming since it was fine last year, He took is that still good. Levels are much lower and there is less risk this year. He wanted to double check. After he provided available information to address her question caller stated that what it said last year and he took it and he was fine. Responded that animal-derived raw materials are used during the manufacturing process of Comirnaty (2025-2026 Formula)|(COVID-19 Vaccine, mRNA) but are not expected to be in the final product presentation. The final product does not contain any animal-derived ingredients. The caller inquired about the potential interaction between the Pfizer COVID-19 vaccine and an antibiotic, levofloxacin. Would it affect the efficacy of the vaccine or antibiotic itself. Caller stated that he has taken it for 10 days and has 20 more days to go, when attempted to clarify who the caller was referring to, in terms of taking medication, caller stated that "he is right here though" unclear who the caller was referring to later on caller stated "this is just a mild infection".
Comirnaty (2025-2026 Formula); Levofloxacin