Very sick; Dry heaves; Diarrhea; Yesterday she slept all day and all night; Feeling tired; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  An 80-year-old female patient received BNT162b2 (BNT162B2), on 03May2022 as dose number 4 (booster) , single (Lot number: FP4554, Expiration Date: 10Jun2022) at the age of 80 years, in left arm for covid-19 immunisation. The patient's relevant medical history was not reported. There were no concomitant medications. Vaccination history included: BNT162b2 (Dose:1, NDC/ EXP: Unknown, they were not provided on vaccine card, Lot No: EL3249), administration date: 19Jan2021, when the patient was 79-year-old, for Covid-19 Immunization; BNT162b2 (Dose:2, NDC/ EXP: Unknown, they were not provided on vaccine card, Lot No: EM9810), administration date: 09Feb2021, when the patient was 79-year-old, for Covid-19 Immunization; BNT162b2 (Dose:3, NDC/ EXP: Unknown, they were not provided on vaccine card), administration date: 23Dec2021, when the patient was 80-year-old, for Covid-19 Immunization. The following information was reported: FATIGUE (non-serious) with onset 03May2022, outcome "recovering", described as "Feeling tired"; SOMNOLENCE (non-serious) with onset 04May2022, outcome "unknown", described as "Yesterday she slept all day and all night"; DIARRHOEA (non-serious) with onset 05May2022, outcome "recovered" (05May2022), described as "Diarrhea"; RETCHING (non-serious) with onset 05May2022, outcome "recovered" (05May2022), described as "Dry heaves"; ILLNESS (non-serious) with onset 05May2022, outcome "recovered" (05May2022), described as "Very sick". Therapeutic measures were not taken as a result of fatigue, illness, somnolence.  Additional information :: She just got the second COVID booster Tuesday 03May2022. She got it Tuesday, and was really tired after like she was with the first booster vaccine. Yesterday, she was tired all day and sleeping all day and night. She got up this morning, and ate breakfast. She ate eggs, toast, bacon, and drank OJ. An hour later, she was in the bathroom. She has never ever been so sick like ever. She had diarrhea and dry heaves. She has heard a lot of people say the second booster was the worst one. Her husband got his second booster too and it didn't touch him. He didn't experience anything. She doesn't know the first number she called to report last time, but she did report that she was tired after her first booster to Pfizer. Reference number: no She feels fine now. She is just really tired. She hasn't eaten since though she has just been hydrating by sipping on a diet coke. She needs to get her lazy butt out of bed. treatment: none She got it at a facility. COVID vaccine History: First dose: 19Jan2021 Second dose: 9Feb2021 first booster: 23Dec2021 Second booster: 03May2022 with lot number FP4554 in her left arm. She didn't provide the lot number for the first 3 doses, but was asked. She doesn't know if Pfizer would advise her to get another booster in the fall, but she doesn't think she will. She doesn't want to get transferred to Medical information. There is no way she will get another one.. She says she has done no treatment.