burning type sensation in the lungs; Difficulty breathing; Initial information received on 23-Jul-2021 regarding an unsolicited valid non-serious case from a pharmacist (patient itself) and physician.  This case involves a 31 years old male patient (185 cm and 117 kg) who experienced burning type sensation in the lungs (burning sensation) and difficulty breathing (dyspnea), after receiving INFLUENZA QUADRIVAL A-B VACCINE [FLUZONE QUADRIVALENT].  The patient got the Flublock several times.  Patient's medical history (including any illness at time of vaccination) and family medical history was reported as none.   The patient's past medical treatment(s) and concomitant medication(s) were not provided.   Patient was not allergic to eggs.  On an unknown date, the patient received a dose of suspect INFLUENZA QUADRIVAL A-B VACCINE (lot number and expiration date not reported) via unknown route in an  unknown administration site for prophylactic vaccination.  On an unknown date, the patient developed a non-serious burning type sensation in the lungs if ever made a fire and when trying to get the embers if inhale the smoke  (burning sensation) and difficulty breathing (dyspnoea) (unknown latency) following the administration of INFLUENZA QUADRIVAL A-B VACCINE.  It was reported that "Caller is a pharmacist calling on behalf of himself about the Pfizer Covid (coronavirus disease) Vaccine. Caller states he reported this event to VAERS and they told him to contact Pfizer as well. Caller states he had his first Covid Vaccine on Friday 16-Jul-2021 and he started having severe heart palpitations on Saturday and he ended up going to the ED (emergency department). Caller states he felt like his heart was pounding though his chest, he was sick, and felt like he was going to pass out. Caller states he didn't know what it was, but his heart was pounding through his chest. Caller states when he got to the ED his blood pressure was 197/97 and his pulse was 101. Caller states they retook his blood pressure and it was 167/97 and pulse was 101. Caller states the doctor at the ED blew him off and said this is a common reaction to the vaccine, heart palpitations. Caller states if that is a common reaction, man, he felt like his heart was going to explode out of his chest. Caller states he had more palpitations and then they finally broke. Caller states the next day, he had the palpitations again. Caller states he tried to walk and get them to calm down, tried laying down and it was still not going down, so he went back to the ED because his heart was still beating through his chest. Caller states yesterday 03:00 a.m. the palpitations started again, and it lasted 4 hours. Caller states he took a video with his phone of his pulse ox showing his heart rate of 119. Caller states he was still trying to calm down and it would go down to 80 but then it would go back to 100. Caller states he could get his pulse to come down but then it would go straight back up for 4.5 hours and then they finally stopped yesterday around 20:00-21:00. Caller states his pulse so far at rest is back in the 60s sometimes 50s, and he is not going through the oh my god he is going to die in his chest. Caller states the Tachycardia started at 10:30-11:00 on Saturday, and it would go for several hours and then go back to normal, then it would start pounding again and then it was normal overnight, he thought it was over and then Sunday morning he was checking with his pulse ox and it was in the 60s like it normally is. Caller states he got in his truck because his friend was coming over and he felt a huge pressure in his chest and his hands were pale so went home and put his pulse ox on and it was reading 88 for O2 (oxygen) saturation and his heart rate was in the 120s. Caller states he started walking to de-stress himself and his color came back to his hands, but his heart was still pounding, so he walked on the treadmill for 30 minutes, and his O2 sat came back up, and the pressure was slightly relieved. Caller states he sat in his recliner and leaned back and tried to do vagal maneuvers and deep breathing, and he felt it start to go down and rev back up again and it wouldn't stay down and on his pulse ox his heart rate would go down to 70s and 80s and back up to 100s. Caller states he did deep breathing and it would go up and down up and down. Caller states he decided he didn't know how much more his heart could take, so he went back to the ED. Caller states they did an EKG (Electrocardiography), CBC (complete blood count), CMP (comprehensive metabolic panel), and Troponins because it was the second day of a high heart rate, but they all came back normal. Caller states the troponins were undetectable so no heart damage. Caller states they say it was a strong fight or flight reaction and if it doesn't go away in a few days, he needs to do something else. Caller states yesterday he woke up at 03:00 a.m. and his heart was pounding through his chest again. Calling states prior to this, his heart was feeling like it literally was going to explode so he recorded it with his phone going up and down up and down, because when he would get to the ED it is back to normal and it is hard to get a diagnosis. Caller states he video taped it several times. Caller states yesterday morning it lasted 4.5 hours and then his heart rate went back to the 60s. Caller states praise Jesus, now for 24 hours it has been back in the 60s and like normal. Caller states the 60s is at rest, sometimes dropping down to the 50s, but it stays in the 60 range maybe hits the 70 range. Seriousness Criteria: Caller states he would say this is serious. Caller states for 3 days, he couldn't do anything, and he thought he was going to die. Caller states now it appears to have went away, but it was pretty scary. Caller states he has never had that issue randomly show up".   It was unknown if the patient experienced any additional symptoms/events.   It was not reported if the patient received a corrective treatment.  At time of reporting, the outcome was unknown for the reported events.  There will be no information on the batch number for this case.