elevated blood pressure; elevated heart rate; not feeling like herself; the booster dose; This is a spontaneous report received from contactable reporter (Consumer). The reporter is the patient. A 64-year-old female patient received bnt162b2 (BNT162B2), administered in arm right, administration date 20Dec2021 11:45 (NDC number: 59267-1000-02; Lot number: FJ1620, Expiration Date: 28Feb2022) at the age of 64 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "low blood pressure" (unspecified if ongoing), notes: With her she has always had very low blood pressure, 114/74. The patient's concomitant medications were not reported. Vaccination history included: Bnt162b2 (Dose 1, injection in upper right arm, Expiration: 11May2022), administration date: 11May2021, when the patient was 63 years old, for COVID-19 immunization; Bnt162b2 (Dose 2, Pfizer covid vaccine, injection in upper right arm, Lot: EW0187, Expiration: 31Aug2021), administration date: 02Jun2021, when the patient was 63 years old, for COVID-19 immunization, reactions: "blood pressure which was very high, like 194 first reading that night, second reading was 160 something", "She was not feeling herself", "felt a little lightheaded". The patient did not receive vaccinations 4 weeks prior covid-19 vaccination. The following information was reported: IMMUNISATION (non-serious) with onset 20Dec2021 11:45, outcome "unknown", described as "the booster dose"; BLOOD PRESSURE INCREASED (non-serious) with onset 24Dec2021, outcome "recovered" (04Jan2022), described as "elevated blood pressure"; HEART RATE INCREASED (non-serious) with onset 24Dec2021, outcome "recovered" (04Jan2022), described as "elevated heart rate"; FEELING ABNORMAL (non-serious) with onset 20Dec2021 11:45, outcome "unknown", described as "not feeling like herself". The events "elevated blood pressure" and "elevated heart rate" were evaluated at the physician office visit and emergency room visit. The patient underwent the following laboratory tests and procedures: blood pressure measurement: (Sep2021) 194, notes: very high like 194 first reading that night; (Sep2021) 160, notes: reading was 160 something and was told it would be hours or days before she could see a doctor, so she came home; (Dec2021) normal; (24Dec2021) elevated; blood test: (Dec2021) unknown results; (Dec2021) unknown results; electrocardiogram: (Dec2021) unknown results; heart rate: (Dec2021) normal; (24Dec2021) elevated; laboratory test: (Sep2021) looks good; (Sep2021) good, notes: All her tests look good, heart, kidneys, and she looks good; renal function test: (Sep2021) looks good. Therapeutic measures were taken as a result of blood pressure increased. Therapeutic measures were taken as a result of blood pressure increased. Clinical course details: The patient mentioned that she had episodes started after the second shot and then a couple episodes since the booster dose. She had episode of elevated blood pressure and heart rate on 24Dec2021. She mentioned that she did not feeling like herself. She went to emergency room (ER) and had an EKG (Unknown results), two blood works and left at 3 am (Unknown results). Her blood pressure and heart rate were back to normal and they could not tell her what was going on. She confirms she was never admitted either time she went to the ER. The treatment included she was put on high blood pressure pills after the episode in September. The last episode (elevated heart rate and blood pressure) was two nights ago, she stayed at home. She started feeling it at 6:40 pm and it lasted till 09:00 pm to 10:00 pm. She was relaxing sitting in a rocker when it started. She has done all these different tests to figure out what is going on. She mentioned that HCP mentioned that when she was put on high blood pressure pills, it takes time. With her she has always had very low blood pressure, 114/74. With her the high blood pressure was all of a sudden.