Woke up nauseous; Couldn't stop vomiting; Couldn't stand, got vertigo; Couldn't stand, got vertigo; violently ill; slept all day; This is a spontaneous report from a contactable consumer. A 56-years-old female patient received bnt162b2 (BNT162B2), dose 2 via an unspecified route of administration, administered in Arm Left on 24May2021 (Batch/Lot Number: EW0176; Expiration Date: 31Aug2021) as 2ND DOSE, SINGLE DOSE for covid-19 immunisation. Medical history includes, hypothyroidism from an unknown date and unknown if ongoing, Armor Thyroid she is on her second bottle, from Apr2021 to 22May2021 she stopped taking it on because she felt it was not helping. Clarified she stopped taking it the day before. NDC, lot, expiry unknown, as product is in a pharmacy bottle. Provides discard by date of 11 MAY 2022. Indication for Armor thyroid is as She was active and goes out with friends. She was starting to have weight gain, feeling tired, having all kinds of problems last year, with extreme fatigue, tiredness, weight gain. She never gained weight other than when she was pregnant. She saw the doctor, her endocrinologist, had some blood work done. She never had thyroid problems before. She was losing hair and wondered why she had a little bald spot. Had bloodwork done several times over the last year, and she also had Doppler of legs, when all this happened last year, her feet and legs were swollen up. Then states she did not have any test results relevant to her experience with the COVID vaccine. Historical vaccine include Dose 1 Covid-19 Vaccine on 03May2021 (Expiry Date 31 Aug 2021) .Concomitant Products includes: Multivitamin: (Start: Unknown Stop: Ongoing) Did not take every day the last couple of weeks. Has taken for years; taken since a teenager. Vitamin D3 because was deficient in vitamin D from an unspecified start date and ongoing. Started taking at end of March, beginning of April some time. Started at the about the same time she started taking the thyroid medication. The patient experienced woke up nauseous, couldn't stop vomiting, couldn't stand, got vertigo, violently ill and slept all day on 27May2021 It was about 12:15am or 12:30am in the morning she felt nauseous. She went to the Emergency Room (ER). She was in the ER for six to seven hours. The ER gave her medicine to stop the spinning and stop the vertigo. She got Zofran for vomiting and Antivert for vertigo. They didn't give her anything, but she looked on the discharge paperwork and does not have the NDC/Lot/Expiration date for either of those medications. Saw that she also got Valium, but not sure what it was for. She does not have the NDC/Lot/Expiration date for that medication either. The patient underwent lab tests and procedures which included blood test unknown results in 2020. Therapeutic measures were taken as a result of woke up nauseous, couldn't stop vomiting, couldn't stand, got vertigo, violently ill. All the symptoms stopped, she came home and slept all day Thursday on 27May2021, called off work on Friday on 28May2021. Then over the weekend felt great. Sunday, she felt much better. Not sure if it was a reaction related to the vaccine but curious if it was. It was like 48 hours after. The Outcome for event Woke up nauseous, could not stop vomiting, could not stand, got vertigo was recovered however for event violently ill and slept all day it was unknown.