accompanied with a panic attack; 2nd dose- went into a tachycardia event that was beyond anything she has ever had in the past 40 years; trauma; 2nd dose- extremely exhausted; This is a spontaneous report from a contactable consumer (patient) reported for herself. An 81-years-old female patient received bnt162b2 (BNT162B2), dose 2 via an unspecified route of administration on 15Mar2021 (fairly early in the day) (Batch/Lot Number: EN6198) as 2ND DOSE,SINGLE for covid-19 immunization, at the age at vaccination of 81 years old.  Anatomical Location of Administration of Pfizer vaccine considered as suspect: She did not really remember but she tends to think it was in her right arm for both. Medical history included tachycardia (This all started when she was 43 years old, and usually gets them periodically; benign with a regular rhythm), ongoing panic attack had for 40 years, ongoing anxiety (reported as she was an anxious person and at first she thought that it was just her anxiety kicking in but the event was beyond anything in 40 years that she has ever experienced). Historical vaccine included first dose of BNT162B2 on 24Feb2021 (Lot Number: EN6200) for covid-19 immunization and experienced tired a little bit. The patient's concomitant medications were not reported.  The patient experienced 2nd dose- went into a tachycardia event that was beyond anything she has ever had in the past 40 years (hospitalization) on 17Mar2021 with outcome of recovered on unknown date, accompanied with a panic attack (hospitalization) on an unspecified date with outcome of unknown, 2nd dose- extremely exhausted (non-serious) on 15Mar2021 with outcome of recovered on 15Mar2021, trauma (non-serious) on an unspecified date with outcome of unknown. Reported as she got her second dose on 15Mar2021 and both her husband and her were extremely exhausted, not sleepy, just tired. They were told to expect that though. There was no pain or nothing at the injection site for her. Then 2 days later she went into a tachycardia event that was beyond anything she has ever had in the past 40 years. She knew how to take care of these events and they are usually accompanied with a panic attack and she can usually calm it with breathing. But this was extreme, it was beyond anything in the past 40 years that she has ever experienced. Her husband took her to the hospital and they checked her out and she was okay and her heart did calm down. But what was interesting was that ever since that event on 15Mar2021 she had not had 1 panic attack or one tachycardia episode. She had a slight one not to long ago but it was not like the ones that she used to get. She used to get these events fairly often in a short period of time. She is not sure if the COVID vaccine did anything, but she was grateful if it did but she just wanted to make that comment about the good. 2nd dose- She was extremely exhausted and this began soon after she had the COVID vaccine fairly early in the day. Her and her husband came home soon afterwards and looked at each other and said that they were tired and it was not sleepiness, it was not like they needed a nap. It was profound tiredness and exhaustion. Her husband had it more so but they were both in bed for a couple hours. Neither had pain in the injection site though. This lasted for several hours into the evening. 2nd dose- Her tachycardia event was on 17Mar2021 which was two days after her COVID vaccine. Her husband took her to the emergency room in the early evening that day and when she got there the event was still occurring but it was not as severe. She was in the emergency room for a couple of hours, so late that night she was released and when she went home she was tired. Which she usually is tired after her tachycardia events occur. But while in the emergency room everything checked out. She confirms that she has recovered completely. She was curious if anyone else has reported anything with this same kind of thing she has experienced. She is amazed because she has had lots of trauma in the last week with her grandson and normally an event like that would have her over the top but she has been calm about it. He was 21 years old and he attempted suicide and she cannot believe it. He was out of state and she was so close to him. At the very last moment he told his dad that he is making a mistake and he just can not stand the isolation from college. This normally would send her into the worst but she has been very calm and maybe it just has not all hit her yet and then also the recent events with her husband would normally make her very frightened. She is glad that she has not had any tachycardia events but this all started when she was 43 years old and she usually gets them periodically. She declined a transfer since it is lunch time and she needs to wake her husband for his lunch. She remembered reading articles while she was waiting for her first dose and tachycardia jumped out at her as a side effect and her husband first thought was that seeing that triggered her but she didn't have anything after the first dose so she dismissed it but then it occurred after her second dose. She was more amazed that she has not had an attack since then and she has not had any tachycardia and she has had them for years and she is just so grateful. The events require a visit to Emergency Room. Not to Physician Office: not really because she did it on her own and then she got in contact with her doctors.   Information on Lot/Batch number was available. Additional information has been requested