headache; went to receive the flu shot/ they gave him another Pfizer COVID-19 vaccine; went to receive the flu shot/ they gave him another Pfizer COVID-19 vaccine; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team for a Pfizer sponsored program (005570). The reporter is the patient.  A 59 year-old male patient received bnt162b2 (BNT162B2), administration date 10Jan2022 (Lot number: 330258D, Expiration Date: 28Feb2022) at the age of 59 years as dose 4 (booster), single for covid-19 immunisation; influenza vaccine (FLU) (Batch/Lot number: unknown). The patient had no relevant medical history. There were no concomitant medications. Vaccination history included: Bnt162b2 (First dose of the Pfizer COVID-19 vaccine was 02Mar2021 with LOT: EN6198, with no EXP provided on his printout for that dose., first dose injected in his arm), administration date: 02Mar2021, when the patient was 58 years old, for COVID-19 immunization; Bnt162b2 (Second dose was on 23Mar2021 and was LOT: EN6207, with the EXP not provided on vaccine card printout.), administration date: 23Mar2021, when the patient was 58 years old, for COVID-19 immunization; Bnt162b2 (Third dose was given 09Nov2021 of LOT: EW0183, with EXP not provided on vaccine card printout.), administration date: 09Nov2021, when the patient was 59 years old, for COVID-19 immunization. The following information was reported: INCORRECT DOSE ADMINISTERED (non-serious), WRONG PRODUCT ADMINISTERED (non-serious) all with onset 10Jan2022, outcome "unknown" and all described as "went to receive the flu shot/ they gave him another Pfizer COVID-19 vaccine"; HEADACHE (non-serious), outcome "recovering", described as "headache". Therapeutic measures were taken as a result of headache.  Additional information: Caller reported that everything was fine until the day before yesterday, he went into the (pharmacy name withheld) for a flu shot and was accidentally given a Pfizer Covid-19 vaccine, making this the fourth dose he has received. Caller was asking if there was anything to be worried about? Caller asked what the recommended time frame was for the immunocomprise to receive each dose. This report was not related to a study or programme. RA number of Unspecified flu shot was not Provided Investigation Assessment: No. Caller confirmed above details and clarifies that it was 10Jan, when the fourth dose of the Pfizer COVID-19 vaccine was given. Caller said he had printouts and they only handwrote the dates of the vaccinations on them, the rest was printed on the vaccination record card, CDC version. Caller said that 10Jan2022 he received his fourth dose which he was not trying to get or supposed to get. He said that the idiot so called pharmacist gave him Pfizer, when he was supposed to be getting a flu shot. RA number for fourth dose of Pfizer vaccine was 59267-1000-03. Initially he said that the LOT could be ending with a zero but then he said it doesn't have the slash like the other zero so he thought it look more like a D. Caller said that the flu shot was what he registered for, which somehow didn't transmit to the pharmacist, who admitted he didn't read the top line of the paperwork when they gave it to him. The patient had been consuming a lot of water anyway, so he continued to drink a lot. He said he had a headache after a couple days and yesterday he took some extra strength Tylenol, of which he took two tablets by mouth, since it was a pretty bad headache. He said he didn't know the exact dose of the extra strength Tylenol he took. He said he also took two Excedrin last night on the 11th. He said it was in the morning around 09:00AM give or take when he took the Tylenol, then he took the Extra Strength Excedrin, which were 250mg each, and he took two of those last night around 2300 hours. He said his headache was better. Caller said that he would like to provide information for which pharmacy it was, which was the (pharmacy name) location off of (withheld) in (withheld). Caller provided (Pharmacy name) Address: (withheld). He said the pharmacist's name was (name withheld), which was all he knew about him. He said he wanted to report it and make sure Pfizer had this information in case this was more of a problem or there were other issues than there are now in the future.