felt achy; had to sleep lots; clumsy; achy; she was exhausted; problem with here bowels; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient. Other Case identifier(s): US-PFIZER INC-2021289232.  A 74 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 05Mar2021 05:45 (Lot number: EN6200) at the age of 74 years as dose 1 single for covid-19 immunisation. Relevant medical history included: "Polymyalgia rheumatica" (ongoing); "Penicillin allergy" (unspecified if ongoing); "shrimp allergy" (unspecified if ongoing). Concomitant medication(s) included: PREDNISONE taken for polymyalgia rheumatica (ongoing). The following information was reported: BOWEL MOVEMENT IRREGULARITY (non-serious) with onset 05Mar2021, outcome "recovered" (06Mar2021), described as "problem with here bowels"; FATIGUE (non-serious) with onset 06Mar2021, outcome "recovered" (08Mar2021), described as "she was exhausted"; PAIN (non-serious), outcome "unknown", described as "felt achy"; CLUMSINESS (non-serious) with onset 08Mar2021, outcome "recovered" (09Mar2021), described as "clumsy"; PAIN (non-serious) with onset 08Mar2021, outcome "recovered" (09Mar2021), described as "achy"; SOMNOLENCE (non-serious), outcome "unknown", described as "had to sleep lots".  Additonal Information: Caller stated that she received the first dose of the pfizer covid 19 vaccine on 05Mar2021. Caller reported that night she had a problem with here bowels and had a bowel issue on first day that she doesn't think was from the shot.. Caller reported that the next morning she felt ok but by the afternoon she was exhausted and wanted to lay down and sleep. Caller reported that on Monday, she woke up and felt achy and clumsy and stated she had polymyalgia rheumatica but this felt different. Caller wanted to know if she can experience the same reaction after the second dose. Caller stated she reported AE and allergy to shrimp and penicillin and wanted to know if this is what caused her side effects to the vaccine. The second day she was tired toward the afternoon Saturday. Then, 18-20 hours later she became exhausted. She slept until Sunday at 1 o'clock. On Monday, she was achy.She felt more achy and clumsy yesterday.Today, she seems fine. She provided her weight as 212-215lbs. She has polymyalgia rheumatica. Which she has been diagnosed with for 20 years or more. It is hereditary. Her mom had it too. She takes prednisone so it makes her weight fluctuate and makes her hungry so she eats. The bowel issue was during the night . It wasn't diarrhea. It was like her bowels emptied. It could have been from the soup she ate or could have been a lot of things . Her polymyalgia affects her muscles and joints, but this achiness was totally different on her joints and muscles. She woke up today and felt fine. She was really achy and clumsy yesterday. She doesn't know it was weird. She rested and felt better as the day went on. She went to the store that morning, and couldn't wait to get home because she was achy all over.She has an allergy to penicillin and shrimp. She told them that at the location she got the vaccine, and they wanted her to stay and extra half hour to make sure she didn't have a reaction.She gets the second vaccine on 26Mar2021, and next time she will get it in her right arm.She has taken Zithromax before, but it does nothing for her. Caller unable to provide NDC/lot/expiration. That was years ago. It did nothing to help her illness. Then she took Cilostazol which gave her a headache. She used that for her polymyalgia too. It didn't help. Adds that she only had a few adverse reactions including feeling tired/extremely exhausted and had to sleep lots. States she already spoke to a safety agent when it first happened and reported her experience including the batch #. States her neighbour received moderna shot and told her they asked if she took any prednisone 2 weeks before the shot. States she takes 5 mg prednisone on daily basis for polymyalgia and 20 mg as needed if shes in a lot of pain and unable to walk.  No follow-up attempts are possible. No further information is expected.