Voice's sound metallic; Sense of taste is night and day different; Mild vertigo; Failure to retrieve words; Series of memory issues all day long interfering with daily living.; tired/Very tired, lack of energy; tired/Very tired, lack of energy; forgetful on simple tasks; more confused about simple activities of daily living; hearing is distorted; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 86 year-old male patient received bnt162b2 (BNT162B2), administered in arm left, administration date 22Apr2021 11:00 (Lot number: EW0164, Expiration Date: 31Aug2021) at the age of 86 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "heart attack in past/Heart", start date: Oct2018 (unspecified if ongoing), notes: Stent for heart attack; "Frequent urination" (unspecified if ongoing). Concomitant medication(s) included: ENTRESTO taken for cardiac disorder, start date: Jul2020 (ongoing); FLOMAX [TAMSULOSIN HYDROCHLORIDE] taken for pollakiuria, start date: 09Oct2020 (ongoing); PREDNISONE (ongoing). Vaccination history included: Bnt162b2 (Dose: 1, Lot number=EP6955, vaccine location=Left arm), administration date: 01Apr2021, when the patient was 86 years old, for Covid-19 immunization. The following information was reported: FATIGUE (non-serious), ASTHENIA (non-serious) all with onset 23Apr2021, outcome "not recovered" and all described as "tired/Very tired, lack of energy"; MEMORY IMPAIRMENT (non-serious) with onset 23Apr2021, outcome "not recovered", described as "forgetful on simple tasks"; CONFUSIONAL STATE (non-serious) with onset 23Apr2021, outcome "not recovered", described as "more confused about simple activities of daily living"; HYPOACUSIS (non-serious) with onset 23Apr2021, outcome "not recovered", described as "hearing is distorted"; DYSPHONIA (non-serious), outcome "unknown", described as "Voice's sound metallic"; TASTE DISORDER (non-serious), outcome "unknown", described as "Sense of taste is night and day different"; VERTIGO (non-serious), outcome "unknown", described as "Mild vertigo"; APHASIA (non-serious), outcome "unknown", described as "Failure to retrieve words"; LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (non-serious), outcome "unknown", described as "Series of memory issues all day long interfering with daily living.". The events "tired/very tired, lack of energy", "forgetful on simple tasks", "more confused about simple activities of daily living", "hearing is distorted" and "tired/very tired, lack of energy" were evaluated at the physician office visit. Therapeutic measures were not taken as a result of fatigue, memory impairment, confusional state, hypoacusis, asthenia.  Additional information: It was reported that the patient went to PCP, ENT, analogist and cardiologist, No issues were detected to explain symptoms. He was reaching out to find a way to mitigate the problem symptoms, decrease their seventy, and return to his problem of functioning. Wife has the problems he has, and she received the 2nd dose the same day. Tennis playing has deteriorated due to difficulty decision making on the court. The patient still run his two foundations and go to work daily, but he experienced a sudden change in cognitive functioning and energy level following the second vaccine. Prior vaccinations (within 4 weeks) was reported as none. No other vaccine in four weeks.Patient did not had allergies.Patient did not tested Covid post vaccination and did not tested Covid prior vaccination.  No follow-up attempts are possible. No further information is expected.