headache; she has not felt great/she hadn't felt good; an increased heart rate; PVC; PAC; tachycardia; I had an irregular, fast heart beat after my first dose; This is a spontaneous report received from contactable reporter(s) (Other HCP) from medical information team. The reporter is the patient. Other Case identifier(s): US-PFIZER INC-202101417521 (Pfizer).  A 61 year-old female patient received bnt162b2 (COMIRNATY), administered in arm left, administration date 08Oct2021 (Lot number: FE3590) at the age of 61 years as dose 1,single for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. The following information was reported: HEADACHE (non-serious), outcome "not recovered", described as "headache"; HEART RATE INCREASED (non-serious) with onset 08Oct2021, outcome "recovering", described as "an increased heart rate"; VENTRICULAR EXTRASYSTOLES (non-serious) with onset 08Oct2021, outcome "recovering", described as "PVC"; SUPRAVENTRICULAR EXTRASYSTOLES (non-serious) with onset 08Oct2021, outcome "recovering", described as "PAC"; FEELING ABNORMAL (non-serious), outcome "unknown", described as "she has not felt great/she hadn't felt good"; TACHYCARDIA (non-serious) with onset Oct2021, outcome "unknown", described as "tachycardia"; HEART RATE IRREGULAR (non-serious) with onset 2021, outcome "unknown", described as "I had an irregular, fast heart beat after my first dose". Relevant laboratory tests and procedures are available in the appropriate section. Caller was a consumer (61 years old, female) inquiring about side effect information for the Pfizer Covid-19 vaccine. Caller reports the patient received her first dose of on 08Oct. Caller states " she had a headache for 2 days now, her main concern was the patient had a headache and cannot get rid of. She was in bed and be honest the patient did not had a headache since yesterday and got it when she got her vaccine, pretty severe, no concerns for anything, but the Johnson and Johnson had problems with headaches, wanted to make sure there was nothing to be concerned about." Caller states "it had been 10 or 11 days since she got the shot and did not get a headache at the beginning. They said her heart arrhythmia and tachycardia was an allergic reaction not just side effect, the patient supposed to get second dose on 29Oct. Caller states the patient got her first dose of the BioNtech covid vaccine on the 8th. 7 minutes after the dose she had an increased heart rate, PVC, PAC and they resolved in 15 minutes and she calmed down. Today was Day 12 and she had a headache. States her daughter is 41 years old and was fully vaccinated as on 12 April. In June she started having episodes of severe vomiting to where she could not hold potassium. She had crazy numbers of GFR, BUN, and Creatinine and had a port placed yesterday. She was currently in the emergency room via ambulance today and it was a mix between CHF and kidney failure. There were no other changes besides her getting the vaccine. Says she had not felt great since she got the shot, she had not felt good. Her head does not stop hurting, it was so much. Did take Tylenol for her to get rid of the headache, just bought it today. Unable to provide any product details for the Tylenol. States the headaches started yesterday and today they are non stop. Unable to provide the NDC, expiry, or dose for the first vaccine. No other vaccines given the same day and none 4 weeks prior. Not sure, but may had problems with Tetanus shot in past, but unable to provide NDC, Lot, or expiry for Tetanus shot. They asked her if she wanted to go to the emergency room and she said she did not know if she needed to or not. She decided to wait a few minutes and they had 4 people stationed with her and a pulse ox on her watching. It finally was coming down and she said she was okay. She had sat for about an hour and then went home. Asks if she should get the second vaccine or not. She did not imagine that she should. They told her it was an allergic reaction she had, but she does not know about the headaches.   No follow-up attempts are possible. No further information is expected.