Rapid pulse causing my blood pressure to drop and cause me to be weak and shaky/ rapid heartrate; Rapid pulse causing my blood pressure to drop and cause me to be weak and shaky; Rapid pulse causing my blood pressure to drop and cause me to be weak and shaky; Rapid pulse causing my blood pressure to drop and cause me to be weak and shaky/a little shaky; anxiety; My blood pressure went higher/ the blood pressure shot up to 135; My pulse went down; This is a spontaneous report from a contactable consumer (patient). A 64-year-old female patient received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, solution for injection, Lot Number: EN6205), via an unspecified route of administration, administered in Left Arm on 22Mar2021 (at the age of 64-year-old) at single dose for so she didn't get hospitalized or die from Covid. Medical history included anxiety. The patient's concomitant medications were not reported. Other Products reported as no. History of all previous immunization with the Pfizer vaccine considered as suspect and additional vaccines administered on same date of the Pfizer suspect were none. No prior vaccinations (within 4 weeks). Patient reported that she had her first dose of the vaccine 3 1/2 weeks before. She postposed the second dose because she experienced a rapid pulse causing her blood pressure to drop and cause her to be weak and shaky. Then her pulse went down and her blood pressure went higher in 2021. She reported that she did not need to receive treatment for the symptoms she experienced but rapid heartrate was listed as a severe side effect and she was nervous about getting the second reporting that her understanding was that side effects from the second dose could be more noticeable with the second. She had been her General Practitioner and her Cardiologist and neither of them know what she should do. She had a side effect after the first dose of the vaccine. On an information handout she read under severe reaction that it mentioned rapid heart beat. About 1 and 1/2 to 2 hours after the injection on 22Mar2021, she had a rapid heart beat and her pulse went down. She felt kind of off and a little shaky. She had postponed her 2nd dose until she received clarification on what she read. She was tentatively scheduled for 12Apr2021, but would reschedule if needed. Caller clarified that she had rapid heart beat and drop in blood pressure one and a half to two hours after the injection on 22Mar2021. She took her blood pressure on her home cuff. She was 64 and not super physically fit, but her pulse tended to run around on average from 60-65 on an unspecified date. Her blood pressure went down and pulse went up on 22Mar2021. She thought it could have been her anxiety or something on 22Mar2021. Her numbers all came back after a period of 30 to 60 minutes. She had never had her numbers go in that direction with anxiety. She had never had her blood pressure drop with raised pulse and vice versa. When the pulse came down the blood pressure shot up to 135 in 2021. She had relatively good blood pressure for a person her age. She usually runs around 100 to 120 on the top number on an unspecified date. Vaccine information card was difficult to read by reporter. Patient clarified LOT number as EN6205, but said it was difficult to read what was handwritten. She was on her way to see her Cardiologist today because her Primary Care Provider could not address her issue. Everything she had read about the 2nd dose indicated a more severe reaction and that was why she needed to be checked out and her experience addressed. No treatment was received for all events. The outcome of the events rapid pulse, blood pressure drop, weak and shaky was recovered on 22Mar2021; outcome of the other events was unknown. This report was reported as non-serious.  No follow-up attempts are needed. No further information is expected.