feels her left arm is like the muscles are depleted and not fully functional; feels her left arm is like the muscles are depleted and not fully functional; she had some fluid removed from her knee; muscle pain ranging from her neck to her elbow; 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.  A 52 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 17Jul2021 15:45 (Lot number: FA6780) at the age of 52 years as dose 1, single for covid-19 immunisation. Relevant medical history included: "Allergies" (unspecified if ongoing); "compromised immune status" (unspecified if ongoing); "respiratory illness" (unspecified if ongoing); "genetic/chromosomal abnormalities" (unspecified if ongoing); "endocrine abnormalities" (unspecified if ongoing); "Diabetes" (unspecified if ongoing); "obesity" (unspecified if ongoing). The patient's concomitant medications were not reported. The following information was reported: MYALGIA (non-serious) with onset 18Jul2021, outcome "not recovered", described as "muscle pain ranging from her neck to her elbow"; JOINT FLUID DRAINAGE (non-serious) with onset 25Jul2021, outcome "not recovered", described as "she had some fluid removed from her knee"; MUSCLE ATROPHY (non-serious), MUSCLE DISORDER (non-serious), outcome "not recovered" and all described as "feels her left arm is like the muscles are depleted and not fully functional". The events "muscle pain ranging from her neck to her elbow", "she had some fluid removed from her knee", "feels her left arm is like the muscles are depleted and not fully functional" and "feels her left arm is like the muscles are depleted and not fully functional" were evaluated at the physician office visit. Therapeutic measures were taken as a result of myalgia, joint fluid drainage, muscle atrophy, muscle disorder.  Additional Information: Vaccination Facility Type was Pharmacy/Drug Store. History of all previous immunization with the Pfizer vaccine considered as suspect (or patient age at first and subsequent immunizations if dates of birth or immunizations are not available were none. Additional Vaccines Administered on Same Date of the Pfizer Suspect If applicable, list all vaccines administered on same date with the Pfizer vaccine considered as suspect were none. Prior Vaccinations (within 4 weeks) If applicable, list any other vaccinations within four weeks prior to the first administration date of the suspect vaccine(s) were none. AE(s) following prior vaccinations were none. The patient had taken Covid-19 vaccine just for protection from COVID-19. The patient reported side effects from the Pfizer Covid 19 vaccine. She had the first shot on 17Jul2021 and since then having muscle pains in the neck to the arm and down to the elbow. These started the day after the vaccine and still prevalent now. She got a muscle relaxer from the doctor and it didn't work. Then felt her left arm was like the muscles were depleted and not fully functional. When she went to get the second dose and they advised her to call Pfizer before getting the second dose. The patient wants to get advice on if she should get the second dose. The patient was to get the second dose on 07Aug2021, but she did not get it. The care provider advised her after she completed filling out the questionnaire, they advised her they were not going to give it and for her to call Pfizer because of her side effects to see if these have been reported by others. She was told to get a second opinion. She went to the doctor and he prescribed the muscle relaxer for the muscle pains, Cyclobenzaprine 5mg, to take 1 per night. Was told to get a second opinion on if she should get the second dose since the muscle relaxer didn't work and her side effects and have either Pfizer or the doctor to contact them with the results and decide if she should get the second vaccine or not. Saw the doctor and got the muscle relaxer on 25Jul2021 and it was working the 26Jul2021-27Jul2021 and then the pains came right back. The patient later added the same day she got the muscle relaxer she had some fluid removed from her knee on the 25Jul2021. The patient asked if it's going to be okay and if she was going to get over the side effect.  No follow-up attempts are possible. No further information is expected.