This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient. Other Case identifier(s): US-PFIZER INC-202101731372 (Pfizer). A 60 year-old male patient received bnt162b2 (COMIRNATY), administered in arm right, administration date 03Dec2021 (Lot number: FJ8757) at the age of 60 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Meniere's disease", start date: Dec2017 (unspecified if ongoing), notes: Officially diagnosed a couple of months ago, he has been going in for this problem since about 4 years ago back in Dec2017.; "allergy" (unspecified if ongoing), notes: which is everything that grows there in Colorado. The patient took concomitant medications. Vaccination history included: Bnt162b2 (Dose:1, Lot: EL8982), administration date: 14Jan2021, when the patient was 59 years old, for COVID-19 immunization, reaction(s): "no adverse effect"; Bnt162b2 (Dose:2, Lot: EL9262), administration date: 04Feb2021, when the patient was 59 years old, for COVID-19 immunization, reaction(s): "Tinnitus". The following information was reported: IMMUNISATION (non-serious) with onset 03Dec2021, outcome "unknown", described as "Booster"; HYPERHIDROSIS (non-serious) with onset 04Dec2021, outcome "recovered" (04Dec2021), described as "I start sweating profusely"; FEELING COLD (non-serious) with onset 04Dec2021, outcome "recovered" (04Dec2021), described as "feel cold"; VERTIGO (non-serious) with onset 04Dec2021, outcome "not recovered", described as "I'm vertigo at the time"; PYREXIA (non-serious) with onset 04Dec2021, outcome "recovered" (04Dec2021), described as "it said 95F, I'm generally at 98.9/felt feverish"; TINNITUS (non-serious) with onset 04Dec2021, outcome "not recovered", described as "I'm having tinnitus/ear ringing it's been ringing almost a month, feels like water is in it, not painful but irritates the heck out of you"; PAIN IN EXTREMITY (non-serious) with onset 03Dec2021, outcome "recovered" (04Dec2021), described as "arm a little sore from the shot"; FEELING ABNORMAL (non-serious) with onset 04Dec2021, outcome "recovered" (04Dec2021), described as "it was very weird"; LOWER RESPIRATORY TRACT INFECTION (non-serious) with onset 04Dec2021, outcome "recovered" (04Dec2021), described as "could feel my chest and it was cold."; HEAD DISCOMFORT (non-serious) with onset 04Dec2021, outcome "recovered" (04Dec2021), described as "head starts to get hot"; COLD SWEAT (non-serious) with onset 04Dec2021, outcome "recovered" (04Dec2021), described as "clammy/cold sweat". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were not taken as a result of hyperhidrosis, feeling cold, vertigo, pyrexia, tinnitus, pain in extremity, feeling abnormal, lower respiratory tract infection, head discomfort, cold sweat. Additional information: The patient took the Pfizer Covid-19 vaccine booster on 03Dec2021 (Friday) in between 11:30am and noon in right upper arm and the following day (04Dec2021), he felt feverish, started to sweat profusely, then turned cold and clammy. He wanted to ask are there any other reports of people reporting colder temperatures versus fever. He reported that it was very weird, his head starts to get hot, then he start sweating profusely, then it went the other way and he started to feel cold and clammy. His wife got a thermometer, it's digital and he checked it 3 times and he is having vertigo at the time, once it beeped she then did it 2 more times, it kept coming back at 96F. She said he should go to the doctor, but he told her no and with the vertigo he can't stand up or he will fall. Later on he felt it subsiding, then it said 95F, he is generally at 98.9, he is a first responder. His wife looked up what temperature to go to the ER if someone's temperature drops and she told him if his temperature was 95 degrees then he should go to ER, but he was at 96, so he was still one degree off and did not go to ER. He is also going through hard times with Meniere's disease that's what gives him the vertigo, and he is having tinnitus, but he was fine other than that. After he got the shot, the nurse told him to wait for 10 minutes so he did and after 10 minutes was fine, went to work, arm a little sore from the shot but that's like the flu or anything else. The next day, he woke up and the room was spinning and had to lay there for 4 or 5 hours which he is not blaming that on the booster since he suffers from Meniere's disease and it was a bout that he was having. At 5:30 in the afternoon, the vertigo started up again felt the sweating start, then his temperature went up again and then went back down to 96 and stayed at 96 for an hour and then the sweating stops and his temperature rises to normal level, this was in the early evening, his chest and stomach were cold and was wearing 2 shirts and a sweatshirt, could feel his chest and it was cold. He never seen it that low before. It only lasted maybe an hour and subsided and went away, Sunday was fine like nothing ever happened, except his ear ringing it's been ringing almost a month, feels like water is in it, not painful but irritates the heck out of you, pressure builds up and that's what causes the vertigo. He missed work today due to a bout of vertigo. HCP does not know about this, and he sees the doctor on a yearly basis for a physical. If has to be seen in a pinch then he will go to an urgent care and the urgent care will transfer the information to his hcp. He had no issues with the first two doses. He will walk up stairs, not run, to get his vaccination card since he does not want to get dizzy and fall over. The patient receives monthly allergy shot which was ongoing as he had been getting it for 7 years, for everything he is allergic to. He does not know the name of the shot, reports it is a mixture of all the things he is allergic to (which is everything that grows there in Colorado). No additional Vaccines Administered on Same Date of the Pfizer Suspect and patient did not visit Emergency Room or Physician Office, but he has an appointment to go to ENT doctor tomorrow. No Prior Vaccinations (within 4 weeks) and no AE(s) following prior vaccinations, no family Medical History Relevant to AE(s) and no Relevant Tests. This follow-up is being submitted to notify that the lot/batch number is not available despite the follow-up attempts made. Follow-up attempts completed. No further information is expected.