sodium was low; Intestinal problems; Trouble sleeping/difficulty sleeping; Blood pressure shot up/blood pressure elevated 197/85; Feel like I'm on speed or something/felt buzzy/she didn't feel right; So tired; Headaches; This is a spontaneous report from a contactable consumer (patient). A 75-year-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE), dose 1 via an unspecified route of administration, administered in left arm on 18Apr2021 16:45 (Batch/Lot Number: ER8735; Expiration Date: 31Jul2021) as 1st dose, single for covid-19 immunisation. Medical history included ongoing vertigo (diagnosed with vertigo so long ago that she can't even remember, she experiences vertigo with changes in barometric pressure when the weather was changing), ongoing arthritis a few years now, ongoing irritable bowel syndrome for a couple of years now, scar tissue in esophagus in 2019 (due to scar tissue in her esophagus, she was unable to swallow anything.  and lost 33 pounds), h1n1 flu, sensitive to medications (she aren't allergic to anything, they just get side effects that they don't like), and blood pressure was really low and sick for months and blood pressure was probably low because she was dehydrated. Concomitant medications included meclizine hcl (MECLIZINE HCL) taken for vertigo, simeticone (GAS-X) and ibuprofen taken for arthritis. Patient stated that she can only tolerate half a pill of meclizine and she might take half of a 12 mg pill at noon and she's ok, but around 6:00 to 6:30 PM, the meclizine knocks her out. The patient received flu vaccine in Oct2020 and experienced several side effects. She never used to get flu shots, but then she got the H1N1 flu and her son was afraid that she might die because she got so sick. After she had the H1N1 flu, she has always gotten a flu shot. One time she got a flu shot and got side effects from it and the side effects all went away. She can't remember when she received the flu shot that she experienced side effects from or what her side effects were because it happened so long ago. Patient had the 1st dose last 18Apr2021, 20 minutes after receiving the 1st dose, she felt buzzy, blood pressure elevated 197/85 (around 17:05 to 17:10), trouble sleeping, and feeling so tired. She reported that she sat and waited for 15 minutes after receiving the Covid-19 vaccine and thought that she would stay for another 5-10 minutes. Within that time frame, it felt like something changed in her, she went up to the nurse and informed the nurse that she didn't feel right; she couldn't explain it and didn't know what it was, but something wasn't right. The nurse at the vaccination facility took her into another area and took her blood pressure; and her blood pressure had just shot up and was 197 or something like that over 85. The staff monitored her and advised to call an ambulance. She did not call an ambulance and her blood pressure did not go back to normal at the vaccination facility but she left anyway. Since then, she feels like she was on speed or something and she can't hardly sleep. Her blood pressure taken 3 different times since 18Apr2021 and her blood pressure was still high in 2021. She was so tired, so tired, and went to the physician because she could hardly even stay awake. Other than that, she had a headache in Apr2021 and has some intestinal problems in May2021. She doesn't know if the intestinal problems were brought on from the Covid-19 vaccine or not. Her headaches were not that bad and reported that her headaches come and go. Her intestinal problems came on a week and a half ago and she has intestinal problems anyway. Her intestinal problems were really different and that's why she went to the emergency room on 12May2021. She put a call into her GI (gastrointestinal) doctor because she has intestinal problems, but she couldn't figure out why her problems were different. Her intestinal problems were more intense than what she usually has. She was trying to get an appointment with her GI doctor to see what's going on and if there could be no correlation at all between her intestinal problems and the Covid-19 vaccine. Patient reported that she went to the emergency room yesterday, 12May2021, because of the intestinal issues, and her blood pressure was 181/86. She relaxed in the emergency room while she was waiting for results of some of the test; she turned off the overhead light, was resting, and nothing exciting was going on. Before she left the emergency room on 13May2021, the nurse took her blood pressure again and it was 170/82. She had gone to the urogynecologist a week ago because she was having some problems that weren't associated with what was going on following the Covid-19 vaccine. Her blood pressure was elevated there as well, measuring 165/96. She even went to her physician's office on 21Apr2021 and her blood pressure was elevated. She has never had high blood pressure and she doesn't want to be stuck taking blood pressure medications for this because she knows that's what her doctor was going to do and she doesn't want to. She inquired if the elevated blood pressure, feeling like you're on speed, difficulty sleeping, and tiredness were side effects that people were experiencing. She stated that for the first couple of days, she had no side effects at all. She received her Covid-19 vaccine on Sunday, 18Apr2021; and on Monday, 19Apr2021 and Tuesday, 20Apr2021, she thought this was great and then she began experiencing the events. She further inquired if her thyroid has anything to do with feeling the way that she feels, like she was going 1000 miles per minute. She went to see her physician on 21Apr2021 because she was so tired/ tiredness that she could barely keep her eyes open. She was waking up tired and she was still waking up tired. Her physician ran a whole panel of blood work and everything was fine. When she went to the emergency room on 12May2021, she took the blood results with her so that they didn't have to run another panel. The only thing that was different about her blood work that her doctor wasn't concerned about was that her sodium was low. Her blood pressure was normally 134/78 or something like that. There was a time where her blood pressure was really low because she had been sick for months and her blood pressure was really low when she went in the one day to see her ENT and her ENT informed her that her blood pressure was probably low because she was dehydrated. She spoke to her 2 doctors and went to the ER yesterday (as reported). Her 2nd dose was supposed to be given last 09May2021 and she told her doctor that she was not going to take it because ever since she had the vaccine, her blood pressure went up. She mentioned that she never had elevated blood pressure until she got the COVID 19 vaccine. She also mentioned that decongestant gives her palpitations. Patient was asking if these were normal reactions from the vaccine. Prior vaccinations within 4 weeks was none. Outcome of events blood pressure shot up/blood pressure elevated 197/85, feel like on speed or something/felt buzzy/she didn't feel right, so tired, trouble sleeping/difficulty sleeping was not recovered; and outcome of the rest of events was unknown.  No follow-up attempts are needed. No further information expected.