after the booster she started having seizures like three a week; she was really sick and had admitted to the hospital; her blood pressure went up; problems with their periods they started get them again after they had the Pfizer; can't walk; Fever; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP).  An 82-year-old female patient received BNT162b2 (BNT162B2), as dose 3 (booster), single (Batch/Lot number: unknown) for covid-19 immunisation. The patient had no relevant medical history. The patient's concomitant medications were not reported. Vaccination history included: Bnt162b2 (DOSE 1, SINGLE), for COVID-19 immunization, reaction(s): "she was okay"; Bnt162b2 (DOSE 2, SINGLE), for COVID-19 immunization. The following information was reported: SEIZURE (hospitalization, medically significant), outcome "not recovered", described as "after the booster she started having seizures like three a week"; MALAISE (hospitalization), outcome "unknown", described as "she was really sick and had admitted to the hospital"; HYPERTENSION (hospitalization), outcome "unknown", described as "her blood pressure went up"; POSTMENOPAUSAL HAEMORRHAGE (medically significant), outcome "unknown", described as "problems with their periods they started get them again after they had the Pfizer"; GAIT INABILITY (non-serious), outcome "unknown", described as "can't walk"; PYREXIA (non-serious), outcome "unknown", described as "Fever". The patient was hospitalized for seizure, malaise, hypertension (start date: 06Aug2022, discharge date: 08Aug2022, hospitalization duration: 2 day(s)). The event "after the booster she started having seizures like three a week" required emergency room visit. The patient underwent the following laboratory tests and procedures: Blood pressure measurement: High, notes: her blood pressure went up. It was high; bunch of test: unknown results, notes: She did all that. I don't know she said they just do a whole bunch of test and all. I don't know what kind of test. I don't even know how to pronounce name for if I did no. But they just gone with a whole bunch of test. Therapeutic measures were taken as a result of seizure.  Clinical information: Reporter stated that patient was never smoked and alcohol and she was totally healthy, minimum walk three times around a walk, twice a week, nothing wrong with her and now she couldn't walk after her booster. Reporter further stated, I was upset because you know it happened with my mother in law (patient) and two of my friends they had problems with their periods they started get them again after they had the Pfizer. Reporter stated, She got the vaccination. The first shot she was okay then after the booster she started having seizures like three a week. When probed for the patient's age, reporter stated, "Around 80, 81." (reporter was unsure of the age). Reporter stated, She did go to the emergency room with her seizures and they put her on something I don't know, probably anti seizure medicines. Than it got so bad the other weekend there's more than a seizures. I mean she was really sick and had admitted to the hospital and they will not let her out. She wanted to go home but they would not let her out for two days because she was so sick and then she got to see a neurologist. 80 years old gives the Pfizer shot and she couldn't even walk and she needs a walker now. She never had that problems before so the blood pressure was way up. Patient had her booster in the Spring and after that she started to have an seizures but this was really going bad with this last wave of COVID, she gets COVID again. She got so bad. She was run into a fever, high blood pressure and all that really bad, before 6 it was just seizures. Patient still experiencing the event, reporter stated, Oh Yes. The information on the batch/lot number for BNT162b2 has been requested and will be submitted if and when received.