Tired, can't sleep; Tired, can't sleep; Heart racing, described as irregular arrhythmia; Heart racing, described as irregular arrhythmia/Heart pounding, hard pounding; Arm barely sore; This is a spontaneous report from a contactable consumer (patient). A 72-years-old female patient received first dose of BNT162b2 (Pfizer-BioNTech COVID-19 Vaccine), at the age of 72-years-old , via an unspecified route of administration, administered in Arm Left on 31Mar2021 11:40 am as single dose for covid-19 immunisation. Medical history included ongoing food allergy, she had anaphylactic shock from a food allergy (she was 40 at the time and she doesn't eat anything she is allergic to), sinus infection and then got horrible hives under her eyes. No Prior Vaccinations (within 4 weeks). Concomitant medication was eye drops every night. No additional vaccines administered on same date of the Pfizer Suspect. The patient previously took epipen had two episodes when she was 40. She is bad about carrying her EpiPen, she forgets it. She was allergic to Amoxicillin. At 11:40 am last Wednesday patient had the vaccine, and around 4 or 5 pm, her heart started pounding for 10 seconds, and it felt like forever. An hour later, her heart started pounding again. It happened twice an hour apart and the second time lasted longer. It described as hard pounding. It started at 4 or 5 pm and then for 4.5 hours there was nothing, but then her heart started racing. At around 4 or 5 pm her heart was pounding, than around 9:30 pm her heart started racing and beating fast, she could feel it. She lives in a rural community and her husband called the local fire station and asked if he could take her there, to the station, so that she could have her heart checked. She was hooked up to a monitor and the paramedics said that she had an irregular arrhythmia and needed to go to the hospital by ambulance. Her heart rate was 115 to 130 beats, then 140 beats, at the hospital. It was about 11pm when she was evaluated and then left in the ambulance, as she was 45 minutes from the hospital. The paramedics would have, the arrhythmia, on record and that 5 minutes before she got to the hospital, the paramedic said her heart rhythm was normal. She was not admitted to the hospital, but held in observation and left the hospital at 4:30 in the morning. She hasn't felt anything after that. it was only one time she thought her heart was going faster, after that, but it didn't happen again. It is currently no problem and even at the hospital, the heart racing stopped and it was normal. The doctor in the emergency room said she was totally normal. Her arm was barely sore, when touched, and noticed this when she was being helped to the bathroom in the emergency room, maybe later in the afternoon, it was not hurting. But she didn't have any other events. She was tired the next day on 01Apr2021. She was up all night in the emergency room. people say that one will be tired, as an effect, but she can't say that it is because of the vaccine, or if she only had 3 hours of sleep. She hasn't been sleeping but she can't attribute it to the vaccine. She can't attribute this to the vaccine, that she has been tired lately and not sleeping. Event outcome of irregular arrhythmia and Heart racing, described as irregular arrhythmia/Heart pounding, hard pounding was recovered on 31Mar2021, of Arm barely sore was recovered on 02Apr2021, of the remaining was unknown.  Information about Batch/Lot number has been requested.