dizziness; headache; Blood pressure spiked pretty high; severe allergic reaction; This is a spontaneous report from a contactable consumer (the patient). A 73-years-old male patient received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Lot Number: EL8982), via an unspecified route of administration, administered in upper left arm on 04Mar2021 10:50 (at the age of 73-years-old) as DOSE 1, SINGLE for COVID-19 immunisation. Medical history included COVID-19 from Jan2020 to an unknown date, collapsed vertebrae from on unknown date, ongoing high blood pressure (been on blood pressure medication for about 35 years), ongoing gout, ongoing high cholesterol, ongoing thyroid problem, ongoing slightly elevated a1c, ongoing vitamin d low, ongoing neuropathy, ongoing diabetes (his wife also has had diabetes for 40 years). The patient was allergic to penicillin. Concomitant medications included losartan potassium taken for high blood pressure from an unspecified start date and ongoing (has been taking for about 10 years); allopurinol taken for gout from 1994 and ongoing; simvastatin (ZOCOR) taken for high cholesterol from an unspecified start date and ongoing (has been taking for 10 years at least); levothyroxine taken for thyroid problems from an unspecified start date and ongoing (started taking 20 years ago at least); metformin taken for slightly elevated a1c from an unspecified start date and ongoing (started taking about a year ago); vitamin d nos taken for vitamin d low from Mar2020 and ongoing (started about a year ago); cyanocobalamin (VITAMIN B-12) taken for neuropathy from an unspecified start date and ongoing (started about 3 years ago); vitamin c [ascorbic acid] taken for antioxidant from an unspecified start date and ongoing (has been taking 20 some years); niacin taken to increase good cholesterol from an unspecified start date and ongoing (started about 15-16 years ago). The patient previously received flu shot for immunisation and experienced sore arm (stated that the sore arm occurs after each flu vaccine, received annually in the November to December time frame). The patient had no prior vaccinations within 4 weeks. On 04Mar2021, the patient experienced dizziness, headache, blood pressure spiked pretty high, severe allergic reaction. Caller stated that he got the first shot last Thursday, 04Mar2021. After receiving the vaccine, he was sitting in the waiting area and became dizzy and got worse and worse. Caller read on the fact Sheet that dizziness was listed as one of the signs that may be included in a "severe reaction" (severe allergic reaction), he experienced after the vaccine first dose: "the issue was that got dizzy after the shot; had a headache that lasted several hours, took about 6 hours for the headache to go back to normal. After waiting 15 minutes, he drove home and called his doctor. His physician's office told him to go to urgent care where he spent the rest of the afternoon he found out that his blood pressure was elevated. Caller read the literature he was provided with his vaccine and it stated that the reaction he experienced was considered severe. It was stated further in the literature that with a severe reaction, it is recommended not to get the second dose of the Covid-19 vaccine. He spoke with the nurse at his doctor's office who recommended that he still get the second dose, and he stated that he's calling to see what we think. Caller stated that he began to experience dizziness after 5-10 minutes. Shortly after that was the headache. They both, head and dizziness, resolved at about 2pm in the afternoon. Caller stated that blood pressure took 4 hours, until about 1:30 in the afternoon, for his blood pressure to come down. He stated that his blood pressure was 160/80, which for him was very high, after waiting an hour and a half at urgent care and that he believed it was probably higher initially when he started getting dizzy. He reported that his baseline blood pressure with medication is 110/70 and he believed it was back to baseline around 20:00 on 04Mar2021. On 04Mar2021, the patient underwent lab tests and procedures which included blood glucose: 121, blood pressure: 160/80, EKG: normal, covid test: negative, on an unspecified date, blood pressure: 110/70, blood pressure: elevated. The outcome of events severe allergic reaction, dizziness, headache, blood pressure spiked pretty high was recovered on 04Mar2021.  No follow-up attempts are possible. No further information is expected.