Lost hearing in left ear; This is a spontaneous report from a contactable consumer (patient). An 81-year-old male patient received second dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, solution for injection, lot: EN6199), via an unspecified route of administration in left arm on 11Mar2021 11:00 (at the age of 81-years-old) as single dose for covid-19 immunisation. No additional vaccines administered on same date of bnt162b2. No prior vaccinations (within 4 weeks). The patient received first dose of bnt162b2 (Batch/lot number: EL1283) in left arm on 18Feb2021 (at the age of 81-years-old) for Covid-19 immunization. Medical history included ongoing borderline diabetes (had that for years; has always been the same; His last test was 6.7 which was pretty good); 2 stents in leg (at least 5 years ago; takes a blood thinner (ongoing)); partial knee replacement (a couple years ago, that came out fine) and shots (when he was in the military, he got all the shots and had no problem). Concomitant medications included clopidogrel bisulfate (PLAVIX) as blood thinner from an unspecified start date and ongoing and just takes his normal medications that the doctors prescribe. He has been taking them for quite a few years so he didn't think they have anything to do with it. He never knows, it could be a mixture. But no, he didn't think any medications he takes were relevant. The patient previously took only one flu shot last Sep2020. No events following prior vaccinations. The patient experienced lost hearing in left ear on 26Mar2021 at 07:00, he woke up and that was it, he had no hearing, it was complete hearing loss. Then he thought maybe it would come back during the day. He heard something and picked his head off of the pillow. His partner was talking, but his right ear was buried in the pillow. When he raised it he could hear her talk. That's when he noticed. The next day he went to same day care and they put him on an antibiotic. He took 2 of the antibiotic the first day and then 1 each day. He didn't know if he has it. He did not have information for the antibiotic or remember the name of it. The event did not require emergency room visit but a visit to the physician's office. went to the same day clinic on 27Mar2021, the day after his hearing loss. He had thought maybe it might come back. The antibiotic didn't work, so he went to his primary doctor on 01Apr2021 and made an appointment with an ENT on 07Apr2021. On 07Apr2021 the hearing test with result of the bottom was completely dead on his left ear, everything else was dead. His right ear was great for his age. What they did was put a needle in his ear drum and shot it with a steroid. They said a couple of treatments sometimes brings back the hearing and sometimes doesn't. They called it sudden hearing loss. He could hear out of his right ear okay. He had good hearing before and had no problems. The patient wanted to know if there had been any problems with loss of hearing after the Covid vaccine. He wished that he would have some improvement. There was no one in his family that lost their hearing, so he would say probably not. No one in his family has any problems or lost hearing or anything. He didn't know of any other problem that would be significant. The outcome of the event was not recovered.