Headaches; Dizziness; Could not walk; Nauseated; Booster Dose; Chills; Shaking; Her arm swelled up; Was inflamed the night of her booster dose; Sick; Could hardly get out of bed; Had pain in arm; Sweats; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 81 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 07Dec2021 (Lot number: FJ1620) at the age of 81 years as dose 3 (booster), single for covid-19 immunisation. The patient had no relevant medical history. Concomitant medication(s) included: LEVOXYL taken for hypothyroidism (ongoing). Vaccination history included: Bnt162b2 (Lot number: EL1283, Anatomical location: left arm, Dose no: 1), administration date: 01Feb2021, when the patient was 80 years old, for COVID-19 immunization; Bnt162b2 (Anatomical location: left arm, Lot number: EN6202, Dose no: 2), administration date: 22Feb2021, when the patient was 80 years old, for COVID-19 immunization, reaction(s): "Pass out", "Chills", "Shaking", "Was drenched in sweat", "Headache", "Dizzy", "She slept throughout the day and the next day she was okay". The following information was reported: IMMUNISATION (non-serious) with onset 07Dec2021, outcome "unknown", described as "Booster Dose"; CHILLS (non-serious) with onset 07Dec2021, outcome "recovered" (07Dec2021), described as "Chills"; TREMOR (non-serious) with onset Dec2021, outcome "unknown", described as "Shaking"; HEADACHE (non-serious) with onset 08Dec2021, outcome "recovering", described as "Headaches"; PERIPHERAL SWELLING (non-serious) with onset Dec2021, outcome "unknown", described as "Her arm swelled up"; INFLAMMATION (non-serious) with onset Dec2021, outcome "unknown", described as "Was inflamed the night of her booster dose"; NAUSEA (non-serious) with onset 08Dec2021, outcome "recovering", described as "Nauseated"; HYPERHIDROSIS (non-serious) with onset Dec2021, outcome "recovering", described as "Sweats"; DIZZINESS (non-serious) with onset 08Dec2021, outcome "recovering", described as "Dizziness"; GAIT DISTURBANCE (non-serious) with onset 08Dec2021, outcome "recovering", described as "Could not walk"; ILLNESS (non-serious) with onset Dec2021, outcome "unknown", described as "Sick"; BEDRIDDEN (non-serious) with onset Dec2021, outcome "unknown", described as "Could hardly get out of bed"; PAIN IN EXTREMITY (non-serious) with onset Dec2021, outcome "unknown", described as "Had pain in arm". Relevant laboratory tests and procedures are available in the appropriate section.  Additional info-Patient reported that she is in excellent health. Everything is perfect. She recently went to the doctor to have an annual physical. She was hesitant about the Booster. Her doctor gave her a little test first, this was in Dec2021. The blood test was to test to see how much antibodies she had in her system and she had antibodies. The doctor did not mention any further about getting/not getting the vaccine. The patient also reported nauseated, could not walk, headache, and dizziness: (From: 08Dec2021 To: Ongoing), Dates for Booster Dose-Sweating: (From: Unspecified To: Ongoing), Dates for Concomitant Products Levoxyl: (Start: Unspecified Stop: Ongoing) Why was the patient taking Concomitant Products Levoxyl (Verbatim): low thyroid Dosage text: 50mcg one tablet a day and two Monday, Wednesday, and Friday, Patient History: No, Her first dose was given on 01Feb2021 and second dose 22Feb2021, Second Dose: Chills and shakes, had it that night, 22Feb2021, Second Dose: Passed out in the bathroom, was drenched in sweat the following morning. Her husband was finally able to get her up out the bathroom and put her to bed and she slept. The sweats went away by mid afternoon. However, she slept all day. By the next day she was okay, she is still sick today, could hardly get out of bed, had pain in arm, could not walk, dizziness, First Dose: Date: 01Feb2021, Lot- EL1283, Administered in left arm, Second Dose: Date: 22Feb2021 Lot: Commented it was handwritten and could not really see it, but later provided as, FJ1620, Administered in left arm, Vaccine Lot Number: EN6202, Anatomical Location of Administration of Pfizer vaccine considered as suspect: Arm Left.  No follow-up attempts are possible. No further information is expected.