Nausea; Dizzy; Quite off balance; Having multiple bowel movements; Did not have much of a appetite and was very tired; Queasy; Felt worst/felt really bad; Tired; Achy; Felt like her digestion was off; Congested; The initial case was missing the following minimum criteria: ICH-Unspecified AE. Upon receipt of follow-up information on (31Oct2022), this case now contains all required information to be considered valid.  This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 76-year-old female patient received BNT162b2, BNT162b2 omi ba.4-5 (BNT162B2, BNT162B2 OMI BA.4-5), on 18Oct2022 at 13:00 as dose number unknown (booster), single (Batch/Lot number: unknown) for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: Covid-19 vaccine (Dose:01, Manufacturer: Unknown), for COVID-19 Immunization; Covid-19 vaccine (Dose:02, Manufacturer: Unknown), for COVID-19 Immunization; Covid-19 vaccine (Dose:03, Manufacturer: Unknown), for COVID-19 Immunization. The following information was reported: NASAL CONGESTION (non-serious) with onset 18Oct2022, outcome "recovered" (2022), described as "Congested"; PAIN (non-serious) with onset 19Oct2022, outcome "recovered" (2022), described as "Achy"; DYSPEPSIA (non-serious) with onset 19Oct2022, outcome "recovered" (2022), described as "Felt like her digestion was off"; FATIGUE (non-serious) with onset 19Oct2022, outcome "recovered" (2022), described as "Tired"; DECREASED APPETITE (non-serious) with onset 20Oct2022, outcome "recovered" (2022), described as "Did not have much of a appetite and was very tired"; FEELING ABNORMAL (non-serious) with onset 20Oct2022, outcome "recovered" (2022), described as "Felt worst/felt really bad"; BOWEL MOVEMENT IRREGULARITY (non-serious) with onset 20Oct2022, outcome "recovered" (2022), described as "Having multiple bowel movements"; NAUSEA (non-serious) with onset 20Oct2022, outcome "recovered" (2022), described as "Queasy"; DIZZINESS (non-serious) with onset 21Oct2022, outcome "recovered" (2022), described as "Dizzy"; NAUSEA (non-serious) with onset 21Oct2022, outcome "recovered" (2022); BALANCE DISORDER (non-serious) with onset 21Oct2022, outcome "recovered" (2022), described as "Quite off balance". Therapeutic measures were not taken as a result of nasal congestion. Therapeutic measures were taken as a result of pain, nausea, dizziness.  Additional information: Reporter stated that this is the only time she had a reaction throughout the course of the shots. Missed one the fourth shots. Clarified that she had three shots and then there was another one after that. Product not specified. Mentioned that she received the Pfizer covid vaccine booster omicron variant shot on 18oct2022 at 1:00pm and was okay. Stated that in the evening she was congested so she thought that her allergies were acting up. Next day on Wednesday she started to get a little tired, achy but had no fever. Caller rambling on despite attempts to redirect. Was able to clarify that she stated that she thought that she okay not so bad and that it was kind of passing. On Thursday she felt worst, felt like her digestion was off, having multiple bowel movements, got achier, was quite tired and felt really bad. Took Tylenol but never had a fever. Had went to bed early because she was having multiple bowel movements, was queasy, did not have much of an appetite and was very tired. On Friday, 21oct2022 she woke up at 5:30 to go to bathroom and was very dizzy so she thought that she would sit for a while. Went to bathroom and was quite off balance so she had to be careful how to hold her head. Had nausea and no appetite. Decided to call the doctor for nausea and told him what she experienced that day and the previous days. Told the doctor that she was taking meclizine for the dizziness. Doctor told her to continue with the meclizine and to take Zofran for nausea which did help. Saturday was a little better. Sunday she was a little better and better each day. Monday she was better and by Tuesday she was back to her normal. Her digestion was back to normal, and the queasiness was gone. Mentioned that it took about a week for this to be completely gone but that it developed over the course of a few days.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.