My first booster, on the next day after I had it I almost fainted; I didn't completely fainted, I felt like I was going to; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 72-year-old female patient received BNT162b2 (BNT162B2), on 23Oct2021 at 08:00 as dose number unknown (booster), single (Batch/Lot number: unknown) at the age of 72 years, in left arm for covid-19 immunisation. The patient's relevant medical history included: "Diabetes" (unspecified if ongoing); "Blood pressure high" (unspecified if ongoing); "Stroke", start date: 2014 (not ongoing), notes: Consumer stated, "I also have stroke in 2014 but I am fine now."; "My left hand is little affected by my stroke" (unspecified if ongoing), notes: My left hand is little affected by my stroke (Further clarification unknown) and it take me seconds. Concomitant medication(s) included: LOSARTAN. Vaccination history included: Flu vaccine (have taken my flu vaccination (Further clarification unknown) for over 20 years and never got a problem. Like I said my second one that's for the day and I was fine with that one."), for Immunization, reaction(s): "never got a problem"; Covid-19 vaccine (Primary Immunization series complete; unknown manufacturer, Like I had the covid shot and I didn't had any problem with that one), for Covid-19 Immunization, reaction(s): "I didn't had any problem with that one". The following information was reported: PRESYNCOPE (non-serious) with onset 24Oct2021, outcome "unknown", described as "My first booster, on the next day after I had it I almost fainted; I didn't completely fainted, I felt like I was going to". Therapeutic measures were not taken as a result of presyncope.  Additional Information: Reaction / Event as Reported by the Primary Source for Translation: My first booster, on the next day after she had it, she almost fainted; she didnt completely faint, she felt like she was going to, Outcome of reaction/event at the time of last observation: Unknown. Concern: Consumer stated, she wants to just tell about her first booster, on the next day after she had it, she almost fainted. When paraphrased the concern, Consumer stated, Right, she did not completely faint. she felt like she was going to. Consumer further added, like she had the covid shot and she didnt had any problem with that one. Height and Weight: Consumer stated, she doesnt know. she thinks my height is like 5 one and a half (Further not clarified hence not captured) and my weight she really dont know. Other Medications: Consumer stated, A lot, Losartan she has a list to make. Will you please hold on she was sorry she gets to the doctor and he didnt give any meds to her. she has, she dont have my meds right here. Treatment: Consumer stated, no its just her friend told her that they held me on a chair, and she just sat there for 20 minutes she was fine. Consumer stated, her left hand is little affected by her stroke (Further clarification unknown), and it took her seconds, Family medical history: Consumer stated, "she was sorry. There is like noise on the phone, No one else. she has taken her flu vaccination (Further clarification unknown) for over 20 years and never got a problem. Like she said her second one thats for the day and she was fine with that one. When probed for prior vaccination, Consumer stated, No. Reassurance : Consumer stated, No its fine. Thank you so much.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.