facial and throat swelling; facial and throat swelling; mental fog; fatigue; stutter; loss of balance; soreness in the arm muscle where he got BNT162B2; This is a spontaneous report from a contactable consumer (patient) from a Pfizer. A 72-years-old male patient received the first dose of BNT162B2 (COMIRNATY) via an unspecified route of administration, administered in Arm Right on 22Feb2021 15:00 (Lot Number: EL9266) as dose 1, single (at age of 72-years-old) for covid-19 immunisation. Prior Vaccinations within 4 weeks was None. Medical history included Kidney cancer (Diagnosed two years ago that they snipped right off), 2 heart attacks with 3 stents, Ischemic heart disease, gout, pectoral angina, prostatitis (took a couple of other vitamins, herbs, and the T medication that is for prostatitis). Family medical history relevant to AEs was none. Concomitant medications included allopurinol taken for gout; losartan taken for pectoral angina; acetylsalicylic acid (ASPIRIN); metoprolol tartrate (METOPROLOL XL); simvastatin; ubidecarenone (COQ-10); Beyodym and rozoani. On 22Feb2021, the patient experienced mental fog, facial and throat swelling, fatigue, stutter, loss of balance, soreness in the arm muscle where he got BNT162B2. The patient experienced side effects of facial and throat swelling, fatigue, stutter, loss of balance, and mental fog. He went to the emergency room for treatment. Due to these side effects, he never got his second dose of the vaccine. Seeking information if he should get the second dose. The patient was tested for a stroke and he didn't have one. The stutter was like he couldn't get the words out or get his thoughts together, his brain and mouth couldn't get in sync. The patient didn't have a rash or nothing on his skin, he had some soreness in the arm muscle where he got it, but it didn't turn red or nothing. The patient took the shot and within the first 3-5 minutes he had face swelling and throat swelling and got epinephrine and Benadryl. The patient reported that he had covid titers drawn on 30Sep2021 at his PCP. The results were 0.0001 which he reported of no coverage for covid. He stated the first shot gave his zero antibodies. The serum that the virus suspended was contaminated and that was why he had no antibodies against the covid 19 infection. The patient asked his doctor to test the titer and its 0 so he got nothing out of that shot. He had the lot and everything and didn't know if there was a bad lot. He was afraid someone at the VA was going to infect him since he works there. Since this looks like it was contaminated lot/batch, can he start over? Or should the patient take the Moderna or the Johnson and Johnson? The patient asked if he could get a second dose, or should he restart the series due to the timing of his first dose back on 22Feb2021 and he had no antibodies against the covid virus. And asked if there had any data regarding the interchangeability between the Pfizer BioNtech covid 19 vaccines and other covid 19 vaccines. All adverse events required a visit to emergency room and physician office and received treatment. Outcome of the events mental fog, facial and throat swelling, fatigue, stutter, loss of balance was recovering; of the event soreness in the arm muscle where he got BNT162B2 was unknown. The case was reported as non-serious.