Brain function is slowing down; Feeling unwell/general malaise feeling; Decreased appetite; decreased energy/no energy; arm pain; congestion; slept a lot; Has Arthritis; dizziness; unsteady on feet; Joint pain; Cognitive confusion; Injection site pain; Tiredness; Headache; Muscle pain; Chills; become inflamed or sore are the weak areas in caller's body; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non-HCP). The reporter is the patient.  An 80-year-old female patient received BNT162b2 (BNT162B2), on 24Aug2022 as dose 4 (booster), single (Lot number: FP7138) at the age of 80 years for covid-19 immunisation. The patient's relevant medical history included: "Immunocompromised" (unspecified if ongoing); "Allergy to almost all medications" (unspecified if ongoing), notes: Allergy to almost all medications. There were no concomitant medications. Vaccination history included: BNT162b2 (1st dose: NDC number, lot number, expiration date: Sees on vaccination card EIN, then either 0 or D, then either 2 or 1, then 58, caller thinks. Hard to read the hand writing on the vaccination card, can try with a magnified glass, the handwriting was not written very legibly on vaccination card.), administration date: 12Apr2021, when the patient was 79-year-old, for COVID-19 Immunization; BNT162b2 (2nd dose:, NDC number, lot number, expiration date: Sees ER8733, unknown what that number is, all that is written on the vaccination card. Then says bid something.), administration date: 03May2021, when the patient was 79-year-old, for COVID-19 Immunization; BNT162b2 (3rd dose, 1st booster: NDC number, lot number, expiration date: May be FF2593, caller is not sure. Unknown what that number is, all that is written on vaccination card.), administration date: 03Nov2021, when the patient was 79-year-old, for COVID-19 Immunization. The following information was reported: CHILLS (non-serious) with onset 24Aug2022, outcome "unknown"; CONFUSIONAL STATE (non-serious) with onset 24Aug2022, outcome "unknown", described as "Cognitive confusion"; HEADACHE (non-serious) with onset 24Aug2022, outcome "not recovered"; VACCINATION SITE PAIN (non-serious) with onset 24Aug2022, outcome "unknown", described as "Injection site pain"; ARTHRALGIA (non-serious) with onset 24Aug2022, outcome "unknown", described as "Joint pain"; MYALGIA (non-serious) with onset 24Aug2022, outcome "recovering", described as "Muscle pain"; FATIGUE (non-serious) with onset 24Aug2022, outcome "not recovered", described as "Tiredness"; INFLAMMATORY PAIN (non-serious) with onset 24Aug2022, outcome "unknown", described as "become inflamed or sore are the weak areas in caller's body"; DIZZINESS (non-serious) with onset 24Aug2022, outcome "not recovered"; BALANCE DISORDER (non-serious) with onset 24Aug2022, outcome "not recovered", described as "unsteady on feet"; CEREBRAL DISORDER (non-serious), outcome "unknown", described as "Brain function is slowing down"; MALAISE (non-serious), outcome "unknown", described as "Feeling unwell/general malaise feeling"; DECREASED APPETITE (non-serious), outcome "unknown"; ASTHENIA (non-serious), outcome "unknown", described as "decreased energy/no energy"; PAIN IN EXTREMITY (non-serious), outcome "unknown", described as "arm pain"; NASAL CONGESTION (non-serious), outcome "unknown", described as "congestion"; HYPERSOMNIA (non-serious), outcome "unknown", described as "slept a lot"; ARTHRITIS (non-serious), outcome "unknown", described as "Has Arthritis". Therapeutic measures were taken because of vaccination site pain, myalgia.  Additional information: Dizziness and unsteady on feet: Caller have had several reactions. One reaction caller had that is not on the list is dizziness and unsteady on feet. Taking Extra Strength Tylenol several times. Start date of adverse event: Yesterday, 24Aug2022, when the Extra Strength Tylenol wore off, so caller took another dose of the Extra Strength Tylenol which helps with the injection site pain. Patient Has general malaise feeling, no energy, slept a lot as well. Headaches are just mild and intermittent. Muscle pain: Stop date of adverse event: Intermittent because caller is taking the Extra Strength Tylenol. Caller is allergic to several other medications. No additional information provided. Has arthritis, so when caller was exposed to the 2nd booster shot the first places that become inflamed or sore are the weak areas in caller's body. Caller is also feeling unwell, has decreased appetite, decreased energy, and arm pain. Also has congestion, doesn't think that congestion was listed on the list. Confirmed caller received a total of 4 doses of the Pfizer COVID-19 vaccine. 4th dose, 2nd booster: NDC number, lot number, expiration date: Sees FP7138, unknown for sure what that number is on the vaccination card. Indication: Caller is an 80-year-old senior with multiple medical issues in addition to being immunocompromised, and because of age and medical history, caller is at serious high risk for getting Covid. Allergic to almost all medications and is immunocompromised.