Lightheaded; almost fainted; dizzy; dizziness; Almost passed out; Very light headache; This is a spontaneous report from a contactable consumer (patient). A 67-year-old male patient received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE; Lot Number: EL9263), via an unspecified route of administration in left arm (shoulder), on 26Jan2021 at 12:00, at a single dose, for COVID-19 immunization. The patient's medical history included blood pressure, acid reflux, and multivitamin. The patient's concomitant medications included amlodipine for blood pressure, esomeprazole for acid reflux, and ascorbic acid/ biotin/ boron/ calcium/ calcium pantothenate/ chloride/ chromium/ colecalciferol/ copper/ cyanocobalamin/ folic acid/ iodine/ lycopene/ magnesium/ manganese/ molybdenum/ nickel/ nicotinamide/ phosphorus/ phytomenadione/ potassium/ pyridoxine hydrochloride/ retinol acetate/ riboflavin/ selenium/ silicon dioxide/ sodium metavanadate/ thiamine mononitrate/ tocopheryl acetate/ xantofyl/ zinc (CENTRUM SILVER ADULTS 50+) as multivitamin, all were ongoing; omeprazole for acid reflux; and an unspecified multivitamin.  The patient really had no issues going on prior to onset of these events. The patient has been administered both first and second doses of Pfizer-BioNTech COVID-19 vaccines. The patient had been having some strange things that he didn't know if its COVID-19 shot related but they're symptoms he never had before. About 8 to 11 days after first dose of the vaccine (Feb2021; maybe 09Feb2021 or 10Feb2021), the patient had a very, very lightheaded episode where he almost passed out or almost fainted. The patient clarified he thinks one event was like 8 days and the other was like 10 days after the vaccine doses were administered, but is not sure, so left it as about 8 to 11 days. Also, in Feb2021, the patient had almost a very light headache where he almost fainted. The patient went to the emergency room in Feb2021 and was admitted to hospital from about 13:00 that day, overnight and discharged about 17:00 to 18:00 the following day. The patient spent the night in hospital, they sent him the next day. While in hospital (Feb2021), the patient had electrocardiograms (EKGs) of his head (as reported), magnetic resonance imaging (MRIs) of his head, computed tomography (CTs; CT scan with contrast) of his head, and echocardiograms of his heart (microcardiogram). All of those tests came back normal (okay), nothing abnormal on results. They were relating this to a stroke-like symptom; however, the results were normal, also his blood test results were fine. The patient had blood work done the first time he was in the emergency room when he was admitted to the hospital in Feb2021; they took his blood 3 to 4 times while he was there overnight and blood work results all came back normal. The patient was not sure what they were testing for, but thinks they were looking for stroke type things because the event almost made him pass out. They did not draw more blood the second emergency room visit. Because of the first episode, the patient then went to his family doctor and the doctor ordered some other testing done. The patient was scheduled to get a nuclear stress test and an exercise stress test (stress test of heart), his results on 10Mar2021 came back normal (not performed until after the second reported event following second dose of Pfizer-BioNTech COVID-19 Vaccine). The patient believed that the results of those tests both came back good, family doctor emailed him the results which were normal. The patient was continuing to have some lightheaded episodes or symptoms just about daily but nothing really; continued to have symptoms which was not normal for him. Sometimes, they last for 30 minutes or more, multiple times a day. Sometimes, the patient had a good day, but he had those lightheaded episodes and he never had it before he got the shot. As therapeutic measures in the hospital, the emergency room gave the patient something for dizziness when he was there, but he was no longer taking it. Currently, the patient was really taking nothing. The patient had also gone to the ear, nose, and throat (ENT) doctor where he had a balance test or a videonystagmography (VNG) test done on 17Mar2021. The patient will get results of balance test on Wednesday (24Mar2021). Every year (unspecified), the patient goes and get his yearly test in which they had his blood work done and this and his glucose levels were always good, cholesterol level was always good. All the patient's other tests come back as normal on an unspecified date. The patient had never had these symptoms before, he hasn't changed his medications or habits and it's odd that this happened 9 to 10 days after both doses of the vaccine. The patient would like to know if this has been reported before as a side effect related to the vaccine. The patient was not sure if the events are Pfizer-BioNTech COVID-19 Vaccine related, but they never happened to him before those doses were administered. He does not know if this is vaccine related or just coincidence that they popped up at the same time as the vaccine doses. Also, he does not know if events could be age related, the medical community can't figure it out so he is trying to get information on if events could be related to the vaccines. So the patient doesn't know if anybody else is reporting this but he had 2 sorts of severe episodes both of them around days after each shot and he was continuing to have lightheaded episodes but not severe as those 2 but he had lightheaded (dizzy) episodes daily, since the COVID-19 vaccine. But they didn't know what brought these episodes on, other than timing wise it was during the COVID-19 shot. And he never had anything like that, and he was not blaming it on the COVID-10 shot. That was the only thing changed in his lifestyle. There might be a possibility, because that's the only thing changed, his medication has not changed, and diet doesn't change. Nothing has changed other than the patient got COVID-19 shots. The patient wanted to report it, so the company had a report file and other people reporting it. The patient wanted to know if the company was having any other report or something like this so that he would know if it might be related to the shot. The patient had not recovered from "Lightheaded; almost fainted; dizzy; dizziness". The outcome of the other events was unknown.