All of her adverse events so far has ended last night except for the fever/the fever was not going away. It was 101.4 degrees today; chills; her legs were killing her/ Her leg and back pain; back pain; body was achy and painful; she has never been able to sleep as well; dizziness; off balance; headache; hangover; dehydrated; arm hurt; sick; she felt really bad; This is a spontaneous report from a contactable consumer or other non-healthcare professional (patient). A 54-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, solution for injection, Lot Number: EN6205), via an unspecified route, administered in Left Arm on 25Mar2021 (at the age of 54 years) as DOSE 1, SINGLE for covid-19 immunisation at vaccine administration clinic. Patient's Medical History (including any illness at time of vaccination) was reported as none. The patient's concomitant medications were not reported also other Products were reported as no. History of all previous immunization with the pfizer vaccine considered as suspect and additional vaccines administered on same date of the pfizer suspect was reported as none. Prior Vaccinations (within 4 weeks) and AE(s) following prior vaccinations was reported as none. On 25Mar2021, the patient experienced chills, her legs were killing her/ her leg and back pain, back pain. On 28Mar2021, the patient experienced all of her adverse events so far has ended last night except for the fever. On an unspecified date in Mar2021, the patient experienced headache, hangover, dehydrated, arm hurt, sick, she felt really bad, body was achy and painful, she has never been able to sleep as well, dizziness and off balance. It was reported that the patient had gotten the first dose of the Pfizer COVID-19 vaccine on 25Mar2021. All of her adverse events so far had ended last night except for the fever. She wanted to know if there were reports of the duration of the fever and if it had been reported as long as hers. She said that she had a fever since Sunday (28Mar2021). It was reported that the patient had the first dose of Pfizer Covid-19 vaccine Thursday morning. She had a little headache. On Friday night she drank a lot. Her head was painful, she just assumed it was a hangover. By Sunday, the headaches were bad and had a fever every day since. Today was the first day she did not have any of the aches and pains or shivers. However, she was still having a fever. She was typically always dehydrated. She had a bladder issue and tried not to drink that much which was bad, she knows. On 25Mar2021 she felt fine. Her arm hurt. She had a slight headache on Friday. It was nothing big. Friday night, she went out with a couple and drank too much. Her husband suggested they go out and celebrate because they both received their first vaccines. They haven't gone out anywhere for a long time. The next morning, she thought she was sick because of the hangover. That night, a friend invited her to Passover dinner. She stated she felt okay, sluggish, but okay. She was still feeling like she had a hangover. The next morning, she felt really bad. She didn't get out of bed until 12 something. She had chills and a fever. She worked out every day, including the day she received her first dose. She did a boot camp and biking on Thursday after the shot and her legs were killing her. She thought it was the workout. Her body was achy and painful. She thought it was also the workout causing that. On Friday she ran a couple miles. The reason she was reporting this is because the fever was not going away. It was 101.4 degrees today. The fever was usually 101 to 102, and 101 degrees was one of the lower numbers. She was worried because she was having Easter. Her kids were coming home, she knows her Covid test was negative, she does not want anyone to get Covid. She had not been around anyone with Covid. With the pain she has never been able to sleep as well. Since it has gone away, it was a good sleep. The patient was tested for Covid the following Monday after her first vaccine. She was afraid she had Covid. She was not around people with Covid but was told if her fever doesn't go away at end of the week, she should come back. She asked if there have been any other people reporting her similar symptoms and how long had those symptoms lasted. She clarified her dizziness and off balance started Sunday and ended 30Mar2021. She recovered completely. Her leg and back pain started thursday and both went away last night and she has recovered completely. She added everywhere she reads, if someone is dehydrated, symptoms are worse and can be increased. After receiving the Rapid Covid test, they advised no PCR test because of the vaccine she had. The AE(s) all of her adverse events so far has ended last night except for the fever, she felt really bad and she didn't get out of bed, she was dizzy, off balance. The dizziness started on Sunday and ended on Monday. She confirmed she has recovered completely from the dizziness and problems with balance required a visit to Physician Office and not to Emergency Room. Investigation Assessment was reported as yes. It was reported that this report was not related to a study or programme and serious was reported as no. The patient underwent lab tests and procedures which included covid rapid test: negative on 29Mar2021; body temperature: 101.4 (fever 101.4 degrees today) on Mar2021. The outcome of the event all of her adverse events so far has ended last night except for the fever was not recovered, the events events chills, her legs were killing her/ Her leg and back pain was recovered on 31Mar2021, the events the event dizziness and off balance was recovered on 30Mar2021, and the other events was unknown.   No follow-up attempts are possible. No further information is expected.