it was very painful and exhausting; she could hardly walk; states it attacks her muscles; Chills; States her arm hurt really bad after this one; was so painful in her body; it was in the muscles and bones of her legs; booster dose, third dose, left arm; booster dose, third dose, left arm; started feeling exhausted; .This is a spontaneous report from a contactable consumer or other non hcp (female consumer patient).  A76 year-old female patient received BNT162b2 (CONMINTARY, Solution for injection, Lot Number: FF2588, NDC number: 59267-1000-01, Expiry date: unknown), via an unspecified route of administration, administered in Arm Left on 16Sep2021 as 3rd dose, single for covid-19 immunisation (age at vaccination was 75years). Historical vaccine was a76 year-old female patient received BNT162b2 (CONMINTARY, Solution for injection, Lot Number: EN5318), via an unspecified route of administration, administered in on 28Jan2021 as 1st dose, single for covid-19 immunisation. a76 year-old female patient received BNT162b2 (CONMINTARY, Solution for injection, Lot Number: EN6200), via an unspecified route of administration, administered in on18Feb2021 as 2nd dose, single for covid-19 immunisation. Medical history included pulmonary embolism from an unknown date and unknown if ongoing had a pulmonary embolism two years ago , covid-19 from an unknown date and unknown if ongoing Covid two years ago and was freezing during that, and states that is how her body reacts, states this stuff just comes later in the day when it hit , thrombosis(Blood clot) from an unknown date and unknown if ongoing why was the patient taking Concomitant Products Eliquis (Verbatim): blood clot/Caller states she takes a blood thinner for the blood clot, Eliquis, 5mg twice a day, ongoing Jan2019 , gastrooesophageal reflux disease from an unknown date and unknown if ongoing Takes this with Pepcid because she has GERD. Concomitant medication(s) included apixaban (ELIQUIS) taken for thrombosis, pulmonary embolism from Jan2019 and ongoing; famotidine (PEPCID AC) taken for gastrooesophageal reflux disease from an unspecified start date and ongoing; colecalciferol (VIT D [COLECALCIFEROL]) taken for an unspecified indication, start and stop date were not reported; cyanocobalamin (VIT B12) taken for an unspecified indication, start and stop date were not reported. The patient experienced booster dose, third dose, left arm (off label use), booster dose, third dose, left arm (extra dose administered), started feeling exhausted  on 16Sep2021, it was very painful and exhausting on 21Sep2021, it was in the muscles and bones of her legs on 16Sep2021, she could hardly walk  , states it attacks her muscles  on 21Sep2021, chills, states her arm hurt really bad after this one, was so painful in her body on 16Sep2021.  The patient underwent lab tests and procedures which included sars-cov-2 antibody test: negative   on Aug2021 in August, before returning she had to have a Covid test, and it was negative.  Therapeutic measures were taken as a result of it was very painful and exhausting, it was in the muscles and bones of her legs, states it attacks her muscles. Upon Follow-up on 24 Sep2021no new information has been updated. Follow-up attempts are completed. No further information is expected. The clinical outcome of the events experienced booster dose, third dose, left arm (off label use) , booster dose, third dose, left arm (extra dose administered) was unknown , started feeling exhausted  was not recovered , it was very painful and exhausting, it was in the muscles and bones of her legs, she could hardly walk  , states it attacks her muscles  , chills was recovering , states her arm hurt really bad after this one was unknown , was so painful in her body was recovering.   Follow-Up (24 Sep2021): Follow-up attempts are completed. No further information is expected.  Description of product complaint: Patient was reporting adverse events to the Pfizer Covid vaccine booster shot, her third dose, states she had the booster shot last Thursday, 16Sep2021 and she is finding is that it is strong. States her arm hurt bad after this one, states this one was really strong. Other product information: Product details about first dose received 28Jan2021, Lot No: EN5318, second dose 18Feb2021, Lot No: EN6200