Woke up and couldn't even walk because her muscles were so bad as far as pain was concerned.; she could barely walk because the Covid-19 vaccine affected the muscles in her legs; Pfizer Covid-19 vaccine really affected her bad; Because her knees started hurting a lot; Because she kept complaining that the pain wouldn't let her sleep at night.; This is a spontaneous report from a contactable consumer or other non hcp (patient). A 63-year-old female patient received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for Injection, Batch/Lot Number: ER8732), via an unspecified route of administration, administered in arm left on 24Apr2021 (at the age of 63-year-old) at dose 1, single for covid-19 immunisation. Medical history included patient reported that she did not take any medications or have any medical conditions prior to receiving the Covid-19 vaccine. Prior Vaccinations within 4 weeks was None. Family Medical History Relevant to Adverse event: None. Patient reported that her mom and dad lived until they were 97. Patient reported that her mother and father never even had high blood pressure, that they were very healthy and just died of old age. The patient's concomitant medications were not reported. patient previously received flu shot (Adverse event following prior vaccinations: None. Patient reported that not even the flu shot for Influenza Immunization has given her side effects and she gets one every year). The patient experienced because her knees started hurting, because she kept complaining that the pain wouldn't let her sleep at night a lot on an un-specified date in Apr2021, pfizer covid-19 vaccine really affected her bad on 25Apr2021, woke up and couldn't even walk because her muscles were so bad as far as pain was concerned, she could barely walk because the covid-19 vaccine affected the muscles in her legs on 27Apr2021. Patient reported that her physician is sending her for physical therapy and it's getting expensive for her. Pfizer Covid-19 vaccine really affected her bad: Patient reported that on Monday, 27Apr2021, she woke up and couldn't even walk because her muscles were so bad as far as pain was concerned. Patient reported that she called that day to see her primary care physician and they asked her to come in the next day. Patient reported that she could barely walk because the Covid-19 vaccine affected the muscles in her legs. Patient reported that the physician she saw, one of the doctors in her primary care physician's group, prescribed her some crutches and pain medicine which was ibuprofen and some Tylenol. Patient reported that her physician's office told her to come back in 2 weeks and she wasn't getting better. Patient reported that at that point, she was working from home, but chose to go into the office because she needed to stay mobile and didn't want the pain to knock her down. Patient reported that a couple weeks went by and she was just in a lot of pain. Patient reported that her physician kept telling her that the pain was a side effect and that it was going to go away. Patient reported that she had an EMG done and it came back negative, fine, nothing wrong. Patient reported that she saw a neurologist and was informed there was nothing wrong. Patient reported that she took it upon herself to see an orthopedist because her knees started hurting a lot. Patient reported that she went to see the orthopedist and he informed her that it definitely wasn't her knees, it was just a side effect from the Covid-19 vaccine. Patient reported that they took her off crutches because she was depending on them and is now using a cane. Patient reported that the pain doesn't go away. Patient reported that she is starting therapy on Friday, 25Jun2021. Patient reported that the pain has stayed the same since it began. Patient reported that the pain is really bad in the morning when she gets up and sometimes it will wake her up in the middle of the night. Patient reported that her physician even gave her antidepressant pills because she kept complaining that the pain wouldn't let her sleep at night. Patient reported that she has a harder time in the morning and if she sits down for a long time. Patient reported that she tries to get up every 55 minutes. Patient reported that she didn't want to take the second dose of the Covid-19 vaccine but her physician told her that she had to get it. Patient reported that she was a whole week late with the second dose because she was scared to get it. First Dose: Administration Date: 24Apr2021, Lot Number: ER8732, Anatomical Location: Left arm. Second Dose: Administration Date: 22May2021, Lot Number: EW0162, Anatomical Location: Left arm. Patient reported earlier in the call that she received the first dose of the Covid-19 vaccine on 25Apr2021 and woke up on 27Apr2021 with side effects. Caller reported after finding her vaccination card that she received the first dose of the Covid-19 vaccine on 24Apr2021 and that 25Apr2021 must have been the day that she felt it because that date sticks out in her head. Patient reported that she was the person that didn't even take Tylenol because she didn't want it in her system. Caller reported that now she doesn't have a choice but to take Tylenol, otherwise she would die of pain. Patient reported that the problem now, she doesn't care how much medicine they give her, the pain is constantly there and doesn't go away anymore. Investigations: Patient unable to provide the date of the echogram that was performed to check for blood clots. Patient reported that everything has come back negative, which is a blessing, but she just wishes that they would find out what happened to her. Patient reported that she didn't want to get the second dose of the Covid-19 vaccine. Patient reported that the nurse practitioner at the vaccination facility didn't want to give her the second dose because the patient was crying and scared. Patient originally reported that she received the Covid-19 vaccine on 25Apr2021 and began experiencing side effects on 27Apr2021. Patient later amended the dates, providing 24Apr2021 as the date of her first dose of the Covid-19 vaccine and 25Apr2021 as the date that she began to experience side effects. Dates confirmed with patient. Second dose of Covid-19 vaccine administered 28 days after first: (From: 22May2021 To: Unspecified) (Vaccine Lot Number: EW0162, Vaccine Lot Expire Date: Unknown, Time the Vaccination Was Given: 10:00, Anatomical Location of Administration of Pfizer vaccine considered as suspect: Arm Left). The patient underwent lab tests and procedures which included Echogram: negative on an unspecified date in 2021 Negative for blood clots, EMG: negative on 27May2021. Patient received treatment with ibuprofen and some Tylenol. Outcome of the events Pfizer Covid-19 vaccine really affected her bad was not resolved, woke up and couldn't even walk because her muscles were so bad as far as pain was concerned, because her knees started hurting a lot, because she kept complaining that the pain wouldn't let her sleep at night was unknown.  Follow-up attempts are possible. Further information is expected.