Chest pain; Shortness of breath; Shoulder pain; Temperature: 100.3 degrees Fahrenheit; Pericarditis; The diagnosis he has is acute Pericarditis, peritonitis; This is spontaneous report from a contactable consumer (patient). This 75-year-old male patient received the second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Lot#: EM9810) at single dose in left arm on 19Feb2021 11:00 for COVID-19 immunization. The first dose was on 28Jan2021 (Lot#: EL9261) at noon in left arm. Adverse events following prior vaccinations was none. Additional vaccines administered on same date of the pfizer suspect was no. Prior vaccinations (within 4 weeks) was no. Ongoing medical history included controlled high blood pressure diagnosed around 2000; heart beat irregularities, diagnosed in his 20s, in 1971, he had his first EKG at that time. Concomitant medication was not reported. On 10Apr2021, patient experienced chest pain, shoulder pain, shortness of breath and ended up in the hospital. Temperature was 100.3 degrees Fahrenheit on 10Apr2021. It took a while to find out what was wrong, it was pericarditis, an inflammation and probably a viral infection of the pericardium. Patient was hospitalized on 10Apr2021, in the evening and discharged in the middle of the afternoon the next day, 11Apr22021, less than one day. The chest pain ended on 12Apr2021, but he had a relapse, and it was ongoing and persisting. Shoulder pain basically lasted for 24 hours. He was put on medicine and it got better, but he had a relapse last week and it was persisting. Shortness of breath had a relapse last week. When he was put on medicine, he felt better, but when he got off the medicine, he relapsed and he didn't know if it was persisting or getting better. Pericarditis was diagnosed on 11Apr2021 and it was ongoing and improving. Temperature was resolved the next day, the 11Apr2021 with the medicine. Patient was put on medication when he went to the Emergency Room. The medication was provided to deal with the inflammation. Ibuprofen was taken 600 mg by mouth, 3 times daily for inflammation, he took it from 11Apr2021 to 18Apr2021. The dose was lowered to 1200 mg per day, then 600 mg per day. When he went off of it, the symptoms came back. Caller was taking 200 mg tabs by mouth 6 times a day. Caller had a prescription dose that was higher before, the big ones, but that's over with now. Patient was taking colchicine at 0.6 mg by mouth once a day. It was an anti-inflammatory. The ibuprofen was stopped and after 3 weeks, his symptoms came back and he was put back on the ibuprofen. The colchicine was a 30-day prescription. He would run out this week and would renew it for a 30-day supply. Patient added these medications tear up the stomach, so they put him on pantoprazole at 40 mg once per day. The ibuprofen was 600 mg tabs, NDC: 65162-0465-50, quantity 21 tabs, no refills, Rx: 6330005, it was just in a bottle, not a shrink-wrapped thing. The diagnosis he had was acute pericarditis, peritonitis and the cause was unknown, but was being treated as a viral infection. He was asked if he had a cold or upset stomach, which would then indicate the type of infection he had but he didn't have anything. These would help determine which type of virus it was. In his case it was unknown and unknowable. When the caller was weaned off the ibuprofen his symptoms came back with in a couple days. His temperature went up, he experienced shoulder pain and was short of breath. He was put back on the ibuprofen at that time. He was anticipating many more weeks of symptoms based of the way he was being treated by the doctor. The patient added the symptoms that presented were almost the same as a heart attack and he was concerned when he started to experience those symptoms. There was no clear evidence of what has caused his symptoms, he did not know if it was by Covid-19 or the Covid-19 vaccine but it was possibility. Patient hoped it was not the vaccine. All the adverse events required a visit to emergency room and physician office. Therapeutic measures were taken for all the adverse events. The outcome of event body temperature increased was recovered on 11Apr2021, the outcome of event pericarditis was recovering, the outcome of events shortness of breath and peritonitis was unknown. The outcome of rest events was not recovered.  The information on the lot/batch number has been requested.