gets confused and her personality changes; gets argumentative; burning urination/UTI; burning urination/UTI; diarrhea; chills; 99.7 degree Fever; shaking; feeling tired/Tired rest of day; This is a spontaneous report from a contactable consumer (Caregiver called in behalf of her mother in law (Patient)).     A 91-years-old female patient received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Batch/Lot Number: EN6205, Expiration date was not reported), dose 1 via an un-specified route of administration, administered in Arm Right on 06Mar2021 13:00 (At the age of 91-years-old)  as single for COVID-19 immunisation. The patient medical history included diagnosed allergies, compromised immune status, respiratory illness, genetic/chromosomal abnormalities, endocrine abnormalities (including diabetes) and obesity. She has Congestive Heart failure and a lot of allergies. Diagnosed with allergies over the years.  Not to any vaccine.  Arthritis diagnosed 10 years ago. She is on medication for Cholesterol- Diagnosed for that is unknown. more than 4 years. On an unspecified date the patient fell and broke her hip last summer they had caretakers for her (She had the fall be-fore the vaccine. It was last summer, but it does not have anything to do with the vaccine.  No further details provided.); Family medical history: none. The patient Concomitant medications included warfarin (2mg a day,  It changes based on her INR. No further details) taken for Blood thinner (She has been on it for at least 4 years). The patient did not receive any other vaccines within four weeks prior to the vaccination.   The patient experienced during the night chills on 07Mar2021 03:00 She did not notice anymore chills, diarrhea on 11Mar2021 19:00, burning urination/UTI (Urinary Tract Infection) on 17Mar2021 08:00, feeling tired/Tired rest of day on 07Mar2021, During the night 99.7-degree fever on 07Mar2021 03:00, shaking on 07Mar2021 03:00.  Reporter not sure if patient can get to her appointment for the 2nd dose on 27Mar2021. Patient was visibly shaking when she woke up at 3am and did not wake reporter up until 6am. she had 4 good days and then had diarrhea. She had another good day and then went into a UTI. She does not know if they had anything to do with it or not. she gets confused and her personality changes. With her UTI, patient gets confused and her personality changes. She gets argumentative. With her heart failure and age, it was good for her to have the vaccine. She has had congestive heart failure for years and is on blood thinners. She also takes 10 other medications. She takes blood pressure medications and vitamins. She did not think they were relevant. No further details provided. If she wants to reschedule, does she need to wait a certain number of days after she finishes the CIPRO. 17Mar2021, she asked for a specimen cup and took a urine sample to their office. The patient under-went lab tests and procedures which included body temperature was 99.7 degree on 07Mar2021 (03:00). Patient received treatment of tylenol for chills, 99.7-degree fever. Tylenol as part of her nor-mal regimen. On 18Mar2021, she knew that she had it (UTI) and she called the doctor and he gave her Cipro (ciprofloxacin) antibiotic (it was in a pharmacy vial. Unknown dose), which she has been on since 18Mar2021. She was tired the rest of the say day. She takes Tylenol as part of her normal regimen.  No further details provided on the Tylenol. She did not notice anymore chills.  There was not a prescriber.  She had it at (Pharmacy name). It was reported that the patient was tired and wanted to reschedule her appointment for second shot. Patient will be on the CIPRO until 28Mar2021. Her next shot would have been 27Mar2021. Reporter wanted to know if the ciprofloxacin will have an effect on the vaccine. Asking if ciprofloxacin will have an interaction with the COVID 19 vaccine. Reported does not want the patient to go through with getting the shot if it will not be any good. Reporter stated that, Tired rest of day - Unable to confirm start time. She never recovered from fever and diarrhea (it was off and on until 15Mar2021) and was tired the rest of the day.  She later stated fever and diarrhea were improved. The outcome of event shaking, she gets confused and her personality changes, She gets argumentative were unknown; outcome of rest of all events were recovering at the time of this report.   No follow-up attempts are possible. No further information is expected.