she felt a little dizzy/slight dizziness/dizzy; had a problem walking; This is a spontaneous report from a Pfizer-sponsored program. A contactable consumer (patient herself) reported that a 83-year-old female patient received first dose of BNT162B2 (Pfizer-BioNTech covid-19 vaccine, Formulation: Solution for injection, Lot Number: Unknown, NDC number: Unknown, Expiration date: Unknown) via an unspecified route of administration on 28Jan2021 at single dose for covid-19 immunization. The patient's medical history included surgery on her hips and radiation on her head. Concomitant medications were not reported. It was reported that, "caller felt dizzy for about 30 minutes after the Covid vaccine she received on 28Jan2021. A few days later, she was still dizzy at her home. Also reported a history of a surgery on her hip which made her feel unbalanced". There was no PQC present. She would like to know whether she should get the second dose of the Covid vaccine; whether dizziness is a serious reaction; would she have any benefit after just one dose of the Covid vaccine; would like to know my recommendation on whether to proceed with the Covid vaccination series. Individuals who had received one dose of Pfizer-BioNTech COVID-19 Vaccine should receive a second dose of Pfizer-BioNTech COVID-19 Vaccine to complete the vaccination series. The caller wanted to find out what she needs to do. She had her first dose of Pfizer vaccine on the 28Jan2021. After she had given first dose, she stayed for half an hour, but her daughter said she needed to stay longer but when she was about to walk away, she felt a little dizzy. When she got home, she never mentioned this slight dizziness to the Pharmacist who administered the vaccine. She did not know it was important. After a few days, she read the pamphlets and saw dizziness is not a good thing. Several days after the injection, from time to time she would feel dizzy that she needs to hold on to something so that she will not fall. She was 82 years old and she had surgery on her hips and radiation on her head. She would like to know that what she needed to do about her situation. States that on 28Jan2021 she received a vaccine the Pfizer Covid vaccine, the first one, after sitting at the pharmacy for about 30 minutes she went to her car and was dizzy as she was walking, has a walking cane that she walks with because she is not young and has problem with her hips, did drive herself home, did not know there is a problem with being dizzy after the vaccine, after a few days she because dizzy and had a problem walking in the house, had to hold on to things, decided to call to find out what is the next thing that she should do, when she finally read the flyer it said that if someone is dizzy this is a serious thing. Caller wants to know what she should do, caller was encouraged to reach out to her health care provider for medical advice. Caller already filed a report. Did not have a reference number. Asked if the information she already provided could be looked up. Woman was reading a disposition about Pfizer and got disconnected. Caller asked should she take the second vaccine. Caller stated she used to be 5 foot 5 inches, stated she was shrinking. Declined to provide email address. Declined to provide HCP information. There was no product complaint to report and medical information requested. Outcome of the event dizzy was not recovered (reported as persisting) whereas had a problem walking was unknown.  Information about Batch/Lot number has been requested.