acute episode of vertigo; nausea; vomiting; collapsed to the floor; episodes of feeling off balance; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 72 year-old female patient (not pregnant) received bnt162b2 (BNT162B2), administered in arm left, administration date 16Nov2021 13:00 (Lot number: FG3527) at the age of 72 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Asthma" (unspecified if ongoing); "arthritis" (unspecified if ongoing); "Rt knee replaced" (unspecified if ongoing). Concomitant medication(s) included: SERTRALINE HYDROCHLORIDE; ALBUTEROL [SALBUTAMOL]; TRELEGY ELLIPTA. Past drug history included: Macrodantin, reaction(s): "Known allergies: Macrodantin"; Tramadol, reaction(s): "Known allergies: tramadol". Vaccination history included: Bnt162b2 (prev dose product=COVID 19,prev dose brand=Pfizer ,prev dose brand unknown=False,prev dose lot number=EN6205,prev dose lot unknown=False,prev dose administration date=12Mar2021,prev dose administration time=12:00 AM, prev dose dose number=2, prev dose vaccine location=Left arm), administration date: 12Mar2021, when the patient was 71 years old, for COVID-19 immunization; Bnt162b2 (prev dose product=COVID 19,, prev dose brand=Pfizer ,prev dose brand unknown=False,prev dose lot number=EN6201,prev dose lot unknown=False,prev dose administration date=19Feb2021,prev dose administration time=12:00 AM, prev dose dose number=1,prev dose vaccine location=EN6201), administration date: 19Feb2021, when the patient was 71 years old, for COVID-19 immunization. The following information was reported: BALANCE DISORDER (hospitalization, disability) with onset 23Nov2021, outcome "recovering", described as "episodes of feeling off balance"; VERTIGO (hospitalization, disability) with onset 06Dec2021 21:00, outcome "recovering", described as "acute episode of vertigo"; NAUSEA (hospitalization, disability) with onset 06Dec2021 21:00, outcome "recovering", described as "nausea"; VOMITING (hospitalization, disability) with onset 06Dec2021 21:00, outcome "recovering", described as "vomiting"; FALL (hospitalization, disability) with onset 06Dec2021 21:00, outcome "recovering", described as "collapsed to the floor". The patient was hospitalized for balance disorder, vertigo, nausea, vomiting, fall (hospitalization duration: 1 day(s)). The events "episodes of feeling off balance", "acute episode of vertigo", "nausea", "vomiting" and "collapsed to the floor" were evaluated at the emergency room visit. The patient underwent the following laboratory tests and procedures: sars-cov-2 test: (06Dec2021) negative, notes: Nasal Swab. Therapeutic measures were taken as a result of balance disorder, vertigo, nausea, vomiting, fall. Clinical course: Starting on 23Nov2021 I experienced episodes of feeling off balance. On 06Dec2021, acute episode of vertigo, nausea and vomiting, collapsed to the floor. Emergency was called. Taken to (hospital name withheld); admitted 24 hours. Discharged to home; (hospital name withheld). Initial evaluation determined vertigo; loss of balance. I was confined to bed with bedside commode and wheelchair. Gradually improving with OT and PT therapy for 30 days. Discharged to outpatient balance clinic. (institute name withheld) (address withheld) (phone number withheld) therapy continues and symptoms gradually improve. PCP; Dr (Name withheld), (phone withheld) 14Dec2021; referred to ENT (info noted). AE resulted in [Emergency room/department or urgent care, Hospitalization, Disability or permanent damage]. Treatment received was Meclazine; zofran, physical therapy.  No follow-up attempts are possible. No further information is expected