gastric problems; off balance; stomach started burning; Disorientated; Dizziness; This is a spontaneous report from a contactable consumer (patient). A 82-year-old female patient received bnt162b2 (PFIZER BIONTECH COVID-19 MRNA VACCINE Solution for injection Lot Number: EL3247) via an unspecified route of administration in the right arm on 03Feb2021 as dose 1, single (age at vaccination: 82 years) for COVID-19 immunisation. Medical history included migraine, arthritis, low blood pressure, thyroid, sleep, allergies, constipation all from an unknown date and unknown if ongoing. Concomitant medications included rizatriptan (RIZATRIPTAN) taken for migraine, start and stop date were not reported; alprazolam (XANAX) 5mg, she takes usually one a day of the 0.5mg taken for sleep disorder, start and stop date were not reported; levothyroxine sodium (SYNTHROID) taken for thyroid disorder, start and stop date were not reported; amlodipine (AMLODIPINE) taken for hypotension, start and stop date were not reported; hydrocodone bitartrate, paracetamol (NORCO) (5-325mg, low dose) taken for arthritis, start and stop date were not reported. On an unspecified date, the patient experienced dizziness, gastric problems, disorientated, off balance, stomach started burning. She stated at first there were no problems at all, the facility watched her for 30 minutes because she had allergies, then she went and had dinner when she got home. She has had dizziness and gastric problems and she does not know it was related. She stated she had been disoriented the last few days. Caller stated her doctors specialty may be internal medicine, she was not sure, she never sees the doctor, just the PA Jenoha who was the one who takes care of her. The dizziness started on the 4th day after her first dose, which was why it was a little different. She stated on the first day she was fine before she went to sleep, it had been a long day, and the next day she was fine. She stated on the 4th day she was so dizzy that her husband helped her get back to bed, which she thought was not bad while laying down, she does not feel dizzy. On the 7th day, one week exactly on Wednesday the 10th she thought she was disoriented when she was going to cook dinner and she forgot how to do it. She stated she thought since she had migraines that she was going to had one so she took her migraine medication and took her pain medication, Norco, because she usually had pain later, but she was not dizzy, she was off balance, and went and laid down. She stated that her stomach started burning, which was the worst thing, like she had strong gas or gastritis, so she took her medication for that which she has from when she had a spell in October, and then it seemed to be ok. She stated her husband wanted to take her to the hospital, but she did not want to go because she wanted the vaccine to work since she had been waiting for it. She stated she took a Xanax her husband gave her and slept well all night last night and was not dizzy. She stated today she had been able to eat, not a lot, and then her stomach pain came back, so she took the Pantoprazole again for her burning stomach. She stated she also had felt uncomfortable between her shoulder blades. She stated her blood pressure was good, she had a machine at home that connects to her doctors office that checks her pulse and breathing, and that all looks good. She stated that she did not had a lot of symptoms that were listed on there, and the only ones that had bothered her were the dizziness which seems not so bad, and her stomach burning. Treatment received was norco was 5-325mg, low dose, generic for hydrocodone-acetaminophen. She stated she usually breaks it in half. She stated it has fill date 21Jan2021. This was prescribed for her arthritis in her back, hands, and knees. NDC/LOT/EXP Unknown, product was dispensed in a pharmacy bottle. She stated that the bottle stated discarded after December 2021. Rizatriptan, her migraine medication she does not take often because she seldom had migraines, and she does not believe this actually was one, she has complex migraines. She stated that this medication was a generic for Maxalt 5mg, it comes in boxes with 9 in there. she stated that the medication was actually Rizatriptan benzoate, and was an orally disintegrating tablets. NDC: 68462-467-46. She stated that there was a pharmacy label on the box, that stated date filled 14 October 2020, she seldom gets this filled. She stated she does not see LOT/EXP, it may be covered by pharmacy label. She stated one of the joys of getting older was no more migraines. She stated what she thought was going to be a migraine which for her was usually confusion and vision, this time was just confusion. She stated that was different. Pantoprazole for the burning she took Protonix, clarified to be generic Pantoprazole. She stated that the dose was 40mg, she takes one a day though they prescribed it as twice a day. NDC/LOT/EXP: Unknown, product was dispensed in a pharmacy bottle. Xanax was given to her from a friend, 5mg, she takes usually one a day of the 0.5mg, sometimes she forgets to, it helps her sleep sometimes. Caller doesn't had the NDC/LOT/EXP to provide for this medication. She had not had any other recent vaccinations or started any new medications. She takes Synthroid for her thyroid and Amlodipine for her low blood pressure. She stated that the doctor told her it wont hurt her if she takes 5mg a day, her heart was ok, she had an ultrasound of her heart last year and an angiogram that was all clear. She stated that she told her doctor that her blood pressure was sometimes low, and the doctor told her don't take it then, take it if it feels elevated. No further details provided about her Synthroid or Amlodipine. Caller stated last year she had trouble with a lot of constipation, so her doctor gave her Protonix and she saw a GI specialist that put her on a laxative every day and coffee. She stated she was not taking Pepcid anymore. No further details about Pepcid provided. She does not want to go to the hospital, she wondered if these could be side effects that she could keep under control with her medications. She stated her brother in law who is a RN said to call the ones that gave her the injection but she cant get through to them at the number they gave and she cant leave a message. The clinical outcome of the events was unknown.  Follow-up attempts completed. No further information expected.