severe vertigo; fall down on the floor; nausea; horrible spinning; vomited; dizzy; generalized weakness; brain fog; a little tired; a little off; Fatigue; sore arm; couldn't eat; couldn't open her eyes; nystagmus; couldn't walk at all without help; This is a spontaneous report from a contactable consumer, reporting for herself. A 61-year-old female patient received the second dose of the bnt162b2 (BNT162B2; Lot Number: EN6208; Expiration Date: Jun2021), via an unspecified route of administration in the right arm on 19Mar2021 at 13:30 at a single dose for covid-19 immunisation. Medical history included ongoing celiac disease diagnosed in 2012 and has been gluten free ever since, allergies, and anxiety. Concomitant medications included zolpidem tartrate (AMBIEN) taken for sleep; cetirizine hydrochloride (ZYRTEC [CETIRIZINE HYDROCHLORIDE]) taken for allergies; alprazolam (MANUFACTURER UNKNOWN) taken for anxiety; vitamin d nos (MANUFACTURER UNKNOWN) taken for immune system health; and magnesium (MANUFACTURER UNKNOWN) taken for health. The patient previously received the first dose of the bnt162b2 (Lot number: EN6203) at 61 years of age on 26Feb2021 between 5:15PM and 5:30PM in the left arm at a single dose for covid-19 immunization and the flu vaccine (INFLUENZA) for immunization 15 years ago and experienced arm was sore. There were no other prior vaccinations within 4 weeks. On 19Mar2021, the patient experienced sore arm. On 21Mar2021, the patient experienced a little off, fatigue, brain fog, a little tired. On 31Mar2021, the patient experienced severe vertigo, fall down on the floor, nausea, vomited, horrible spinning, generalized weakness. In 2021, the patient experienced couldn't open her eyes, couldn't eat, nystagmus, could not walk at all without help. On an unknown date, the patient experienced dizzy. The events, severe vertigo, fall down on the floor, nausea, vomited, and horrible spinning, required emergency room and physician office (video) visits. The patient was hospitalized for severe vertigo, fall down on the floor, nausea, vomited, and horrible spinning from 31Mar2021 to 02Apr2021. The clinical course was as follows: the patient received the second dose on 19Mar2021 and she didn't really have any bad side effects, a sore arm, and a little tired on the second day, maybe a little off but was fine. 12 days later she was vacuuming and had severe vertigo, she was down on the floor, just horrible spinning, horrible nausea and laid on floor and vomited all day. Her doctor told her to go to the ER. They did all kinds of tests with unknown results on an unknown date and she could not open her eyes for 2 days, she was so violently spinning with vertigo, they gave her fluids. She went in on Wednesday and by Friday she was a little better, she could open her eyes, still had spinning and vertigo. It was like nystagmus, her eyes were, she just really couldn't open her eyes for the doctor, had generalized weakness and couldn't walk at all without help in the hospital. The only time she moved from one position was to go to the bathroom with assistance. In the ER, she could not get up out of bed the first night they were trying all ways of catharizing her. She could not even get out of the bed with the help, they had to carry her to the CAT scan with negative result on 31Mar2021. She had slightly improved but still had vertigo and she was not vomiting anymore, that was only the first couple days. She was sent home with medications for dizziness and nausea but they didn't do anything. Two weeks later she was still dizzy, had vertigo, it was way better than it was, she can open the windows a little bit but she was basically in a dark room for like the first week and a half. Not violent like it was the first couple of days. The events were further described as: she was a little sore on 19Mar2021, 20Mar2021, 21Mar2021, and maybe the 22Mar2021 her arm was still sore. She clarified the sore arm pretty much ended on the 22Mar2021. She was surprised she felt fine on 19Mar2021 and 20Mar2021 and on the evening of 21Mar2021, in the middle of the night between 20Mar2021 and 21Mar2021 she felt a little off and a little more tired. On 21Mar2021, she didn't feel great, fatigued and brain fog but was fine after that. She began feeling a little off and a little tired early morning on the 21Mar2021. That was pretty much gone by the 22Mar2021. The feeling tired and a little off and the brain fog and fatigue went away 22Mar2021. She vomited constantly, started suddenly and violently and was incapable of moving, all she did was vomit and lay on the floor. It was a complete 360, she was fine vacuuming a minute before and then suddenly got dizzy and went down and could never get up. She had to be taken from upstairs in her house and transported to the hospital. She was not really experiencing the nausea now, she was not completely herself but she can eat, she couldn't eat for the first couple of days and was on IV fluids and once she got out of the hospital was able to eat a little and now eating almost normally. It took a week to eat normally and she couldn't eat holiday dinner on 04Apr2021. From 31Mar2021 to 10Apr2021, every day the nausea has slightly been improving. She was not quite herself and still has vertigo and was making herself eat her meals. She vomited 30 times and in the hospital they gave her an IV to stop that and never vomited in hospital, maybe once in the ER. She confirmed the 31Mar2021 was the last time she vomited. She had not recovered completely from nausea. She used be running around all the time, she would walk 10 miles per week to exercise, yesterday she had a mammogram scheduled and she was just so wiped out for doing something for the first time and had to lie down for the whole rest of the day. She was hospitalized from 31Mar2021 until the evening of 02Apr2021 when they let her out. She was given medication for nausea and dizziness didn't do anything. She was given ondasetron (ZOFRAN), 4 mg and meclizine. Because of her weakness, the patient was checked to see if there was any brain bleed or brain stem problems that would explain the vertigo and did not find anything. The tests were negative for any brain problems on an unknown date. Lab data included: blood levels: low on vitamin d (probably because she was not absorbing nutrients as well) on an unknown date, endoscopy: unknown results on an unknown date, and MRI: negative on 01Apr2021. Therapeutic measures were taken as a result of severe vertigo, fall down on the floor, nausea, horrible spinning, vomited, and dizzy. The clinical outcome of the events, severe vertigo, nausea, generalized weakness, could not open her eyes, nystagmus, could not walk at all without help, was recovering. The clinical outcome of the events, fall down on the floor, horrible spinning, dizzy, was unknown. The clinical outcome of the events, a little off, fatigue, sore arm, brain fog, and a little tired, was recovered on 22Mar2021. The clinical outcome of the event, vomited, was recovered on 31Mar2021. The clinical outcome of the event, could not eat, was recovered in 2021.    No follow-up attempts are needed. No further information is expected.