1 significant episode of asymptomatic Supraventricular tachycardia; transient ischemic attack; seizure-like shaking; shaking episode arms going up and down; extremely tired; This is a spontaneous report from a contactable physician (patient himself). A 79-year-old male patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE), dose 2 via an unspecified route of administration in Feb2021 (Batch/Lot number was not reported) at the age of 79-year-old male as single dose for covid-19 immunisation. Medical history included ongoing diabetes type two from 30 years, ongoing hypertension from 15 or 20 years ago, depression from 20 years ago, hyperlipidemia from 15 to 20 years, orthostatic hypertension (had it off and on for years;  but it got bad in the last couple of months), pain and radiculopathy. Concomitant medication included metformin (1000 mg) taken for diabetes from an unspecified start date and ongoing (taking for years); glipizide (4 mg) taken for diabetes from an unspecified start date and ongoing (taking for years); lisinopril (10 mg) taken for hypertension from Mar2021 and ongoing; duloxetine (60 mg) taken for depression and pain from an unspecified start date and ongoing (taking for years); gabapentin (NEURONTIN) taken for radiculopathy, start and stop date were not reported. The patient previously took flu shot for immunization and took dose 1 of bnt162b2 in Jan2021 for Covid-19 immunization at the age of 79-year-old. Physician was calling regarding the Pfizer BioNTech COVID 19 vaccine. He had a very strange experience; added he was a physician and in reasonable good health. He had mild side effects, not much; the one side effect he did have was one week after the second shot he and his wife both felt extremely tired the whole day from Feb 2021. Physician mentioned that 4-6 weeks after getting the 2nd dose, he had a 3-5 minute episode of seizure-like shaking, shaking episode arms going up and down on 21Mar2021 and that he was just blankly staring and non-responsive. He had no other symptoms to suggest a seizure; no biting; no urination. This episode lasted three to five minutes. During the episode his wife said he was just staring ahead and he was non responsive to his wife who was only six inches away speaking to him. Then he started to vaguely he heard his wife's voice in the distance and then he woke up and then he was fine. Later that day he was hospitalized, they did a work up and discharged him about 4 days later. While in the hospital he thought he had a Blood work, CAT Scan; MRI; holter monitor; EEG but they were all normal. He had no other complications and the effect completely went away. Adds he was completely recovered when it went away. At discharge they put him baby aspirin, 81mg enteric coated aspirin once daily, and gave him a tentative diagnosis of transient ischemic attack (TIA). This further resulted to being hospitalized for 3 days but his physicians were not able to see anything significant on his MRI, 72 hours EEGs and telemetry tests (everything was normal). However, during his out-patient visit, his physician mentioned that he had 1 significant episode of asymptomatic Supraventricular tachycardia that may be causing the seizure (inconclusive).  They further specified to him that it was not much of a tonic clonic seizure. He also verified that he only had 1 episode of the mentioned event, no other side effects experience and been feeling fine since then. After discharge he had a work up on the outside including a 72 hour EEG; 72 hour holter with the only thing that was abnormal that one run of 3 beat supraventricular tachycardia that was asymptomatic. His doctor put him on Metoprolol 12 mg once daily at night by mouth to help prevent arrhythmias as well as control his blood pressure. He had previously taken lisinopril. He added the only thing he knew that he never had anything like this before in his life.  Patient mentions he was at a good weight now as he lost 40 pounds last year for his daughter's wedding. He added sometime in the last 6 to 8 months he had severe left side radiculopathy and was taking small dose of gabapentin. He did not remember if it happened before or after the vaccine but he went to see a pain specialist. The medication worked and he tapered it down and discontinued it. It may have been before the vaccine, he is unsure. But the medication worked like a miracle as he had intractable pain down his leg. All events resulted in emergency room. In line with this, he would like to know in relevance to the news of Pfizer releasing a possible booster dose, if there are any reports of anything that may be related to seizure and/or Transient ischemic attack (TIA) of cardiac origin or a like. Extremely tired was reported as non-serious, other events was serious and caused hospital from 21Mar2021 to 24Mar2021. Outcome shaking episode arms going up and down was recovered on 21Mar2021, of extremely tired was recovered in 2021, of other events was unknown.; Sender's Comments: There is no reasonable possibility that the events supraventricular tachycardia, seizure, tremor, and transient ischemic attack happening 4-6 weeks after vaccination were related to BNT162b2. It is more likely to be complications of pre-existing conditions of hypertension, hyperlipidemia, and diabetes. Advanced age may have been contributory as well.  The impact of this report on the benefit/risk profile of the Pfizer product is evaluated as part of Pfizer procedures for safety evaluation, including the review and analysis of aggregate data for adverse events. Any safety concern identified as part of this review, as well as any appropriate action in response, will be promptly notified to regulatory authorities, Ethics Committees, and Investigators, as appropriate.