very difficult time walking around/trouble walking/disability of walking; balance is an issue walking around, she is afraid that she will fall down; Nausea; Tremor; She has difficult to sleeping; weak; she has trouble lifting and holding things/I am not able to function; Anxiety; fatigued; night sweats; dizzy; very tired all the time.; lost 20 pounds; chills; hands tremble; I didn't want to eat at all; mobility is dramatically reduced; This is a spontaneous report from a contactable consumer or other non-healthcare professional (Patient's husband).  An 80-year-old female patient received BNT162B2 (COMIRNATY PFIZER-BIONTECH COVID-19 VACCINE Formulation: Solution for injection, Batch No./lot Number: not reported), via an unspecified route, administered on 09Apr2021 (at the age of 79-years-old) as dose 2, single for COVID-19 immunization. Medical history included AFib (Atrial fibrillation) from an unknown date and unknown if ongoing. Concomitant medications included rivaroxaban (XARELTO), metoprolol (METOPROLOL), eicosapentaenoic acid ethyl ester (VASCEPA) all taken for an unspecified indication, start and stop date were not reported. The historical vaccine included, received BNT162B2 (COMIRNATY PFIZER-BIONTECH COVID-19 VACCINE Formulation: Solution for injection, Batch No./lot Number: GR8734) via an unspecified route, administered on 17Mar2021 (at the age of 79-years-old) as dose 1, single for COVID-19 immunization. No prior vaccinations within 4 weeks. On 09Apr2021, the patient experienced very difficult time walking around/trouble walking/disability of walking, balance is an issue walking around, she is afraid that she will fall down, Nausea, Tremor, She has difficult to sleeping, weak, she has trouble lifting and holding things/I am not able to function, Anxiety, fatigued, night sweats, dizzy, very tired all the time, lost 20 pounds, chills, hands tremble, I didn't want to eat at all, and mobility is dramatically reduced. On an unknown date in 2021, the patient underwent lab tests and procedures which included electroencephalogram: there was also no problem, and ultrasound doppler: no major. Reporter stated that, patient had the second Pfizer vaccination on 09Apr2021 and ever since she had a variety of difficult symptoms with side effects nausea, tremor, no fever but she had difficulty sleeping. She was weak that is she had trouble lifting and holding things and very difficult time walking around and this was a long time since 09Apr and here we are on in Nov. So, she wanted to know what can be done about this. We went to our family practice doctor, we went to a neurologist, we talked to an orthopedic surgeon and none of these people have any idea how to get her back to normal. She was very afraid." Reporter stated that, following her second dose on 09Apr2021, his wife had been practically disabled and had a raft of problems and they need to know what to do to let her get back to normal life because she can barely walk and has nausea. Reporter's wife came on the phone-recording disclaimer provided; she stated that the doctor's don't know what to do and she has made an appointment to go to withheld in two months. She stated it's odd it goes in and out and I get very fatigued and dizzy then ok for a little while then I get nauseous a little bit and have trouble walking. I have lack of interest in my work and I am very very tired all the time. I am not able to function and lost 20 pounds. When I first had it I didn't want to eat at all now I know why I lost too much weight so I try to eat and gain back the weight but 20 pounds is a lot I'm only 5 ft 3 and a half; I've seen someone who had this only had one shot. She states today is a better day and I can walk but I don't know if tomorrow would be, and asked are there other people who have had the same problems? This has been in and out for 7 months. No provider in withheld that knows about it they avoid it like a plague. she had dizziness and mostly fatigue and had night sweats at the beginning but doesn't have them anymore and the chills are all gone. The dizziness is periodically and also imbalance and a lack of interest in anything and a lack of appetite she has to force herself. Reporter stated that his wife has experienced unsteadiness in walking, nausea, extraordinary fatigue all day long, mobility is dramatically reduced, generally wife is an artist painter and her hands tremble so she is not able to paint. She states the cardiologist and neurologist don't know a thing and won't tell her a thing and asks if it will go away or what should she be doing? Reporter stated one doctor said she probably has too many antibodies and that is part of what is causing the disability of walking, balance, eating, everything she described has continued to be a problem since 09Apr2021. Reporter stated his wife has seen her HCP, a Neurologist and had a EEG and also had scans for carotid artery blockage that so far show no problems. The nurse practitioner that did the EEG did a primary read and said it is possible she may have an excessive amount of antibodies. Reporter stated they are now waiting for a second reader for the EEG to confirm if she has too many antibodies and what is the best course of action. Reporter asked how can she come back to a normal function without a fear of falling? Reporter stated she has seen a kidney specialist as well and were told to drink lots of water. He stated the Pharmacist said his mother also had short term side effect problems compared to withheld and she basically knows more but not enough to help her out. Reporter asked if we know of situations that side effects last this long? The therapeutic measures were taken for event anxiety and reported that "She takes a product is for anxiety because of the feelings that these things have caused her called Xanax." The outcome of the event chills and night sweats was recovered on an unknown date; and events very difficult time walking around/trouble walking/disability of walking, balance is an issue walking around, she is afraid that she will fall down, Nausea, Tremor, She has difficult to sleeping, weak, she has trouble lifting and holding things/I am not able to function, Anxiety was not recovered; and events fatigued, dizzy, very tired all the time, lost 20 pounds, hands tremble, I didn't want to eat at all, mobility is dramatically reduced was unknown.  No follow-up attempts are possible. No further information is expected.