lightheadedness; nausea; just a slightly sore arm, which she also had on the 3rd dose.; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 77 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 03Oct2021 (Lot number: 3014BA) at the age of 77 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Blood pressure" (unspecified if ongoing), notes: Blood pressure; "she is allergic to dust" (unspecified if ongoing), notes: she is allergic to dust; "has environmental allergies." (unspecified if ongoing), notes: has environmental allergies. The patient took concomitant medications. Vaccination history included: Bnt162b2 (First Dose: Date 20Jan2021, Lot EL3246, Expiry Unknown, he had no side effects on the first 2 doses, just a slightly sore arm), administration date: 20Jan2021, when the patient was 76 years old, for COVID-19 immunisation, reaction(s): "a slightly sore arm"; Bnt162b2 (2nd dose: Lot EN9581 , he had no side effects on the first 2 doses, just a slightly sore arm), administration date: 2021, for COVID-19 immunisation, reaction(s): "a slightly sore arm".  The following information was reported: DIZZINESS (non-serious) with onset Oct2021, outcome "not recovered", described as "lightheadedness"; NAUSEA (non-serious) with onset Oct2021, outcome "not recovered", described as "nausea"; PAIN IN EXTREMITY (non-serious) with onset Oct2021, outcome "unknown", described as "just a slightly sore arm, which she also had on the 3rd dose.".  Additional information: She experienced lightheadedness nausea and was still getting worse. She was asking if this was a normal side effect and was it normal to get these a week after vaccination. In the beginning of the call, she provided her name and phone number along with her Date of Birth withheld. Caller stated that she was calling about the 3rd dose of the covid vaccine. She confirmed the Pfizer Covid Vaccine. She had a question, she had no side effects on the first 2 doses, just a slightly sore arm, which she also had on the 3rd dose. However, with the 3rd dose that she received on Sunday night 03Oct2021, she experienced lightheadedness and was nauseated after. Caller asked could you have that as a side effect, she has noticed it for a couple days now, was it normal as one of the side effect. Caller confirmed the 3rd dose date as 03Oct2021, she stated that it was a day or 2 after the 3rd dose that she was Nauseated and lightheaded. When queried height and weight she responded with saying that she is too much. The Lightheadedness and Nausea have gotten worse yesterday and today.  Caller stated that it was handwritten and so she was unsure but it says Pfizer Lot 3014BA. She has a medication for Blood Pressure, but she had taken that for years and it was nothing new. About allergies she stated that it's not related, but she was allergic to dust and has environmental allergies. This report was not related to a study or programme. Investigation Assessment: No  No follow-up attempts are possible. No further information is expected.