extreme fatigue/ fatigue and weakness; Muscle weakness; sort of dizziness that made her feel off balance; sort of dizziness that made her feel off balance; Stomach ache; Chills; Shortness of breath; leg weakness; can't lift like she did before this; lost 3 pounds through this; Upset stomach; was miserable for almost 3 weeks; it triggered IBS symptoms as well; freezing; felt like she had a fever but she didn't have a thermometer to check her temperature; fatigue and weakness; sore arm; Booster; This is a spontaneous report from a contactable consumer. This consumer (patient) reported that the 74-year-old female patient received bnt162b2 (BNT162B2), dose 3 via an unspecified route of administration, administered in Arm Right on 14Oct2021 14:00 (Batch/Lot Number: FF2590) at the age of 74-year-old as dose 3 (BOOSTER), single for covid-19 immunisation. Medical history included immunodeficiency from an unknown date and unknown if ongoing. No Family Medical History and she does not know. Concomitant medication included influenza vaccine (FLU VACCINE VII) taken for immunisation from Sep2021 to Sep2021.  The patient previously took first dose of bnt162b2 (Pfizer Covid shot) on 19Jan2021 (LOT: looks like EL3246) in right arm and second dose of bnt162b2 (Pfizer Covid shot) on 12Feb2021 (LOT: EL9264) in right arm for covid-19 immunization.  The patient experienced had every one of the typical covid symptoms on 15Oct2021 with outcome of unknown, extreme fatigue/ fatigue and weakness on 15Oct2021 with outcome of recovering , muscle weakness on 15Oct2021 with outcome of recovering, sort of dizziness that made her feel off balance on 15Oct2021 with outcome of recovering, sort of dizziness that made her feel off balance on 15Oct2021 with outcome of recovering , stomach ache on 15Oct2021 with outcome of recovering , chills on 15Oct2021 with outcome of recovering, shortness of breath on 15Oct2021 with outcome of not recovered , leg weakness on 15Oct2021 with outcome of not recovered, can't lift like she did before this on 15Oct2021 with outcome of recovering, lost 3 pounds through this on 15Oct2021 with outcome of recovering, upset stomach on 15Oct2021 with outcome of recovering, was miserable for almost 3 weeks on 15Oct2021 with outcome of recovering, it triggered ibs symptoms as well on 15Oct2021 with outcome of recovering, freezing on 15Oct2021 with outcome of recovering , felt like she had a fever but she didn't have a thermometer to check her temperature on 15Oct2021 with outcome of recovering , fatigue and weakness on 15Oct2021 with outcome of recovering , still feeling weak on 15Oct2021 with outcome of recovering, sore arm on 15Oct2021 with outcome of recovering. The patient underwent lab tests and procedures which included blood immunoglobulin m: unknown results (She did an IMG which is supposed to be immediate in finding out if any infections are present). They got the results today, blood test: unknown results (PA also did a blood test to find out if she had the infection. She has not had the infection), sars-cov-2 test: negative (More information available (Y/N): No), thyroid function test: unknown results (She was supposed to go have her thyroid checked every 6 months), weight: 105 pounds. Therapeutic measures were taken as a result of had every one of the typical covid symptoms, extreme fatigue/ fatigue and weakness, muscle weakness, sort of dizziness that made her feel off balance, sort of dizziness that made her feel off balance, stomach ache, chills, shortness of breath, leg weakness, can't lift like she did before this (mobility decreased) , lost 3 pounds through this, upset stomach, was miserable for almost 3 weeks, it triggered ibs symptoms as well, freezing, felt like she had a fever but she didn't have a thermometer to check her temperature, fatigue and weakness, still feeling weak, sore arm. The clinical course was reported as follows: She states that her physician's assistant who is actually her regular physician, told her to call Pfizer because she considered this as an adverse reaction. Caller states that she took the first shot and second shot and had no side effects, no sore arm, nothing. Then, she had the Covid booster 14Oct2021 and it is now 3Nov2021. Yesterday was the first day the side effects started to go away. She had every one of the typical Covid symptoms, except loss of taste and smell. She was miserable for almost 3 weeks. Her PA even did additional blood work to find out because she had so many symptoms. She had them for so long and the PA also did a blood test to find out if she had the infection. She has not had the infection. Clarified that the caller was referring to the Covid infection. Caller states that she did not want anybody else to go through this. She was so happy with the first 2. Weight: She thinks about 105 pounds. She lost 3 pounds through this. She had an upset stomach as well which also triggered and it lasted so long it triggered IBS symptoms as well. Caller states that her physician's assistant knows that she called and she is wonderful. She just talked to her this morning when she got the lab results from the blood test. She did an IMG which is supposed to be immediate in finding out if any infections are present. They got the results today. Caller states that she got a negative Covid test Sunday and then she had a blood test that took a little longer. The PA wanted to narrow it down because she was getting so many symptoms. The symptoms started the next day after the dose, on 15Oct2021. She had extreme fatigue, muscle weakness, a sort of dizziness that made her feel off balance, stomach ache and chills. Chills: The chills were on and off and she would feel them just rush through her body. Two minutes later, she would be freezing and was putting on a jacket on and off and on and off. She does not know if she had a fever because when she had those kind of chills, it felt like she had a fever but she didn't have a thermometer to check her temperature. Clarified that all of the symptoms mentioned, the extreme fatigue, muscle weakness, a sort of dizziness that made her feel off balance, stomach ache and chills all started around the same time on 15Oct2021. She states that she does not know what time of day that they occurred, she was just hanging on. Outcome: For 18 days, she had most of these symptoms. Chills: The chills are lessening and she does not recall if she had those on day 18. The fatigue and weakness, she thinks that it accumulative and she is one who goes on the treadmill every other day. She does circuit training and interval training. She usually does silver sneakers, like weigh training and stuff, 2 or 3 times a week. Caller state she had another symptom, shortness of breath. Shortness of breath: Clarified that it started the same date as the other symptoms on 15Oct2021 but she then states that she thinks she noticed it later because she has a new puppy and she was walking on just a little bit of an incline. She was huffing and puffing and she usually does the treadmill for an hour and does not experience any of that. She could feel her legs getting weak, walking up the hill. She still has the shortness of breath, but not as much leg weakness. At work, part of her job is to lift boxes that are pretty heavy. Now, she can't lift like she could before this. Leg weakness: Outcome: It is hard to tell. It hasn't gotten better yet. She thinks the chills have gone down the past several days. She is still feeling weak. Today is the first day she has felt a little more back to normal. She just went out to walk the dog. Her legs are weak and she is usually pretty strong. Her PA that is tracking this, she has a population more the caller's age group and they are calling about their symptoms. Caller has a friend that had them and only lasted at most 3 or 4 days. The PA has considered that there might be other auto immune diseases and did a sed rate, there was nothing, no infection. Caller states that is why she had to call. Treatment: No. About 3 days ago, she still had the symptoms and she thought she would maybe just try a dose of Tylenol, like acetaminophen. Ibuprofen can upset the stomach and she didn't want that. She tried the 2 tablets of acetaminophen and didn't notice any difference. She went to (withheld) where they had a need for care, which gave a whole list of things and didn't give anything to do about side effects. They didn't give any indication that she should be taking anything for muscle weakness or shortness of breath, nothing. There was nothing on the (withheld) site under needs for care. It just hit her like a ton of bricks. Caller states that with flu shots, she never had a sore arm or problem until the Pfizer vaccine. Concomitant medications: Caller states she has medications she has taken for years and there is nothing new. Nothing has changed. No further details regarding medications were provided. Test results: She was supposed to go have her thyroid checked every 6 months. She was supposed to go in for that Monday and she had to wait for a Covid test to come back negative before she could go in. Once she got the Covid test, she had the thyroid test and that is when they saw the kinds of things they would test for to know if there was any infection. Vaccination Facility Type was Pharmacy/Drug Store. No additional Vaccines Administered on Same Date of the Pfizer Suspect. AE(s) require a visit to Physician Office not to Emergency Room. Prior Vaccinations (within 4 weeks): She thinks she had a flu shot around mid Sep2021 but does not know if she has the date. She knows she had it at (withheld). They might have that information.AE(s) following prior vaccinations was none. That is why this is such a surprise. If she would have known, she would not have taken it.  She had a negative Covid test Sunday. Clarified that the caller had taken Tylenol and it did not help. She states that she does not usually use it but nobody was telling her what to do. Clarified that it was acetaminophen that she had taken, the generic form of Tylenol and it was the Equate brand.  Provided LOT: 5KR0276. EXP: She states she is sure it expired because she never uses it. Provided EXP as Jul2018. NDC: 49035-975-83. Caller states that she did not take those 2 tablets until after having the symptoms for probably 14 days. States that the dose was 500mg. From what Pfizer knows about having this happen, what is the recommendation for taking another booster? If she has to have another booster yearly, like when the flu shot comes, is she ok to take it? There is not enough data and they are like the beta tests for the product.   Follow-up attempts are completed. No further information is expected.; Sender's Comments: Linked Report(s) : US-PFIZER INC-202101509832 Same reporter/vaccine/event, different patients