This is a spontaneous report received from a contactable consumer (patient). A 54-year-old male patient (height: 193cm, weight: 99.79kg) received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, batch/lot number: EN6207) via an unspecified route of administration at right upper arm on 18Mar2021 18:00 (54-year-old at time of vaccination), at single dose, for COVID-19 immunization. The patient's medical history included blood pressure, teeth cleaned (Shortly before the shot, went to the dentist to have teeth cleaned. Directly from Dentist went to pharmacy. Went to pharmacy's Drive Thru to pick up a little antibiotic from the dentist. It was 4 capsules of Amoxicillin. He was supposed to take the Amoxicillin before the dentist office visit, but he forgot to do that. Therefore, soon as he left the dentist office he went to pharmacy to pick it up so he could take it. While he was there, was offered the COVID 19 vaccine and that it was the last shot). Concomitant medications included atenolol tablet from 2016 (been taking for 5 years) and ongoing for blood pressure, and ascorbic acid/ cyanocobalamin/ ergocalciferol/ nicotinamide/ pyridoxine hydrochloride/ retinol/ riboflavin/ thiamine mononitrate (ONE-A-DAY). No additional vaccines administered on same date. No history of all previously immunizations. No prior vaccincations wtihin 4 weeks. He got the shot Thursday and by Sunday, many different side effects were coming in. He has had side effects from the COVID VACCINE, but initially he does not want to file report, just thinks that everyone needs to get the shot. He does not have complaints. He is wondering how long the side effects will last, and when they go away. States that he is being treated as he has gone to the doctor's. Also states that he made an appointment with the doctor and almost went to the emergency room a couple of times. Right after the shot, he was getting in the car and his right leg started hurting (on 18Mar2021). It didn't go away for a couple of days. It went away but then noticed his shoes started feeling funny. He wasn't looking at his feet, put his shoes on they felt tight. Then he started to look at feet more. Below his knees, his legs are swollen. Swelling started within 2 to 3 days after the vaccine. The swelling is really severe when standing. Everybody at work has seen how sick he is and his legs. Swelling in the legs has him concerned, thinking maybe it's a blood clot. He was given medicine and would like to see it go away. He keeps his legs up. He has other side effects (all in Mar2021) and is having flu like symptoms. He basically has the flu. He has never had the flu shot. This is the first flu shot (He referred to the COVID vaccine as the flu shot as documented. However, confirmed suspect product as Pfizer covid vaccine) he has had that he knows of. He is questioning if he should get the second shot. He feels a little dizzy. Quick questions get him confused and that it comes and goes. Lungs felt full, gasping for air: not now but, since the doctor gave him antibiotics (unspecified injections, he was given 2 shots at the doctor's office, one in each arm), his lungs felt full. At times he was gasping for air. It went away but thought he was going to die. Now when he gets winded, it feels like he has a dry cough. Gets winded easily. The doctor ordered him an inhaler, Symbicort, but it was very expensive, so he did not get it at that time. He never picked it up because it was too much money. The fluid is not there anymore and he does not feel like he needs this as does not feel like it needs to be cleared. He is having wheezing. He can now take deeper breaths. Fatigue: initially, that he was feeling tired within 1 or 2 days, but he did not recall the next day feeling that way (later stated it was within 2-3 days he started to feel tired). He is still tired. Unable to clarify time frame of fatigue further. He feels bloated and full. Hasn't really eaten but feels real full and bloated. Hot and cold flashes started occurring about the same time as the other symptoms. He had these last evening. He does not get the flu very often and doesn't take the Flu shot. This is the closest thing he can remember having a pretty good episode with the flu. He was also given prescriptions for 2 new medications: Triamterene 37.5mg daily, for leg swelling; Clindamycin, 300mg, twice a day, an antibiotic. The odd thing is that it seems like his eyes are big, like really, really big, like they are really open. It is like big eye balls. States that he is just sick and his body is reacting to getting better. He has not been to work in the last 3 days. States that he is fine, just worried about work. Patient asked for personal advice about going back to work. The outcome of "his right leg started hurting" was recovered; outcome of "below his knees, his legs are swollen/ swelling in the legs/ put his shoes on they felt tight" and Fatigue/feeling tired was not recovered; outcome of other events was unknown.