Felt a slight pain, wasn't sure if it was her heart or chest. Went to hospital, was admitted, three days later was sent home.; vomiting; So weak she couldn't walk; Not feeling well; Extremely nauseous; Weight loss; Stomach pain; Fever; No appetite; minor ache and pain around area where injection was; itching around injection site; This is a spontaneous report from a contactable consumer (patient) under the same suspect products for 4 patients (including the reporter herself). This is one of the 4 reports.  A 73-year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Batch/Lot number: EW0169 (also reported as FW0169), dose 2 intramuscular, administered in Arm Left on 08May2021 (between 1430-1500) (at the age of 73years) as 2nd dose, single for Covid-19 immunization. Historical vaccine included the first dose of BNT162B2 (Lot number: ER8733) on 12Apr2021 (at the age of 73years) for Covid-19 immunization. Medical history included ongoing diabetes mellitus (Diagnosed 10-12 years ago), caesarean section (three C-sections), and hospitalization (due to taking of Aeleve). Concomitant medications included metformin (METFORMIN) taken for diabetes mellitus from an unspecified start date and ongoing (started taking 10-12 years ago; Doctor told her that her A1c was so good she did not even need the medication but kept her on it since it's such a great medication); cannabidiol (CBD OIL) taken for an unspecified indication, start and stop date were not reported (Started taking 7-8 months ago); cyanocobalamin (VITAMIN B-12) taken for an unspecified indication, start and stop date were not reported (Started taking 7-8 months ago); vitamin d3 (VITAMIN D3) taken for an unspecified indication, start and stop date were not reported (Started taking 7-8 months ago). When mentioning vitamins, she states it was two weeks ago she finished them and didn't buy more. Did not specifically refer to which vitamin. The patient previously took MSG (monosodium glutamate) and experienced vomiting (was hospitalized for the same vomiting); Aleve and experienced violent vomiting and elevated heart enzymes (caused violent vomiting and hospitalization and elevated heart enzymes; They said it was a heart attack, but it was ruled out by the cardiologist. She had never taken Aleve before). It was reported that last Saturday, 08May2021, the patient received the second shot of the vaccine, she had minor ache and pain around area where injection was. Sunday morning, she wasn't feeling well, thought she had a fever and had no appetite. She was only able to eat a small tablespoon of sweet potato. On 09May2021, Sunday night she started violently vomiting the whole night. Monday morning (10May2021), she was hospitalized. Two days later (12May2021) she was discharged from the hospital. She was home for a couple of hours and at night started vomiting again. When she vomits, she has to be careful. Felt a slight pain, wasn't sure if it was her heart or chest. She went again to hospital, was admitted (unspecified date), and three days later (unspecified date) was sent home. Yesterday (unspecified date) she was fine, but today (unspecified date) is feeling nauseous, eating crackers and being careful. She has lost weight, had minor pain around injection. The patient added that if she goes to the hospital again, she needs to find another one because she did not do the endoscopy. She knows this was not an endoscopy problem and she have no ulcer. She stated that the stomach pain is from the vaccine. She has not been checking her weight, she does not know when she started losing weight, but she knows that its going down because everyone has been asking her why she's losing weight. She has diabetes, her A1c is 5.3, with Metformin 500mg twice a day, time release. Her A1C is 5.3 (unspecified date). When she was in the hospital for two days, she was really like a zombie. Her children were so scared she was going to die. She is concerned and wants to know what else can she do to improve her health. With the vaccine, how long will the side effects last? How long will the side effects cause her to be down? This morning she hasn't eaten anything yet, except for a couple of crackers, is feeling extremely nauseous, and doesn't want to go to the hospital. It was further stated that she had pain and itching around injection site that started initially with pain. Added tat it was itching before; nothing is bothering her there and doesn't have pain now. Fever: She experienced it Sunday morning on 09May2021, it has gone away, she doesn't know when she had the fever in the hospital. No Appetite: is hungry now but afraid to eat, has just had crackers. Violent Vomiting: began in the evening and didn't sleep one second at all. Stopped when in the hospital after a couple of hours. She was given medicine and fell asleep. She woke up, was nauseous, and would go back to sleep. She was like a zombie. Stayed in the hospital for two-and-a-half days, doesn't remember what day she was discharged. She was so weak she couldn't walk. Heart/Chest Pain: It could be psychosomatic. Two days after being discharged, she tried to vomit chicken tacos and thought she had mild pain. Could have been thinking she was having heart pain. Her heart was monitored the second time but doesn't know what they found, and she didn't have the mental alertness to ask. The hospital never mentioned anything, and she didn't ask. She further stated that she was told to see a gastroenterologist. She added that she does not take any Tylenol or aspirins or anything like that, because she is scared. The outcome of events vomiting, minor ache and pain around area where injection was, itching around injection site, fever, was recovered on an unspecified date; outcome of event no appetite was recovering; the outcome of other events was unknown.  Follow-up activities are needed; information on the batch number has been requested.; Sender's Comments: Linked Report(s) : US-PFIZER INC-2021565268 Same reporter/drug/event, different patient;US-PFIZER INC-2021564496 Same reporter/drug/event, different patient;US-PFIZER INC-2021564473 Same reporter/drug/event, different patient