Muscle pain and joint pain a few days after getting the vaccine; Muscle pain and joint pain a few days after getting the vaccine; Nausea; Upset Stomach; For getting different aches and pains, and he has back pain anyway; Injection site pain; This is a spontaneous report from a contactable consumer (patient). A 72-year-old male patient received first dose of BNT162B2 (PFIZER COVID-19 VACCINE), via an unspecified route of administration, administered in right arm on 20May2021 15:00 (Lot Number: EWO161; Expiration Date: Jul2021) as single dose for covid-19 immunisation. Medical history included ongoing conditions of acid reflux, borderline high blood pressure, borderline cholesterol, pre-existing condition of arthritis (wrist and elbow) and diverticulitis. Family Medical History Relevant to AEs were none and any relevant tests were none. Concomitant medication included omeprazole taken for gastrooesophageal reflux disease from an unspecified start date and ongoing; atorvastatin calcium taken for blood cholesterol from an unspecified start date and ongoing; carvedilol taken for blood pressure measurement from an unspecified start date and ongoing. History of all previous immunization with the Pfizer vaccine considered as suspect were none. Additional Vaccines Administered on Same Date of the Pfizer Suspect were none. Prior Vaccinations (within 4 weeks) were none (Patient stated when he takes the flu vaccine, he gets the flu, but he hasn't had one in a long time and he had the pneumonia vaccine and that was fine). The patient wanted to know if the second dose of the Pfizer BioNTech Covid-19 vaccine can be taken later than 3 weeks and if the AEs that he experienced would be a restriction in getting the second shot of the Pfizer BioNTech Covid-19 vaccine. The patient wanted to know how long his reported AEs usually lasted based on Pfizer studies after the first dose of the Pfizer BioNTech Covid-19 Vaccine, if the side effects that he experienced are included in the commonly reported adverse events after getting the first dose of the Pfizer BioNTech Covid-19 Vaccine. The patient said that after he got first shot for the vaccine, it was going good and then the next day where the shot was given, it started aching. The patient experienced injection site pain and different aches and pains, and back pain on 21May2021, muscle pain and joint pain a few days after getting the vaccine. The patient stated when that started, it trigged his arthritis in his right wrist, and he had joint aches. He said that can happen too and said it would go away but it did not, and it played around and made his joints ache and then it went away. He also experienced the pain on the left extremity, but it was the right arm was mostly his concern. He also stated that the pain somehow messed with his ankle joints and is also considering that this may be related to his pre-existing condition of arthritis (wrist and elbow). He stated that these AEs comes and goes away but was something that is persistent and that got him concerned about. The patient said that next morning it came back again, not heavy or as bad but off and on and kept changing. He stated that he uses his arm and exercises it and keeps using it. He stated that he also experienced nausea (5 or 6 days after the shot) and upset stomach but is mostly concerned with the arm, join and muscle pain which was predominantly felt on his right extremity where he got his vaccine shot. The patient stated that nausea could be part of his acid indigestion stuff, and that if he eats, it goes away. Patient stated the first time he had the nausea was the worst and after that, it was just kind of there, like a bad upset stomach. When he eats, it was all right again and that he can't be on an empty stomach and he can't eat a large amount. Patient said he takes medications for acid reflux and diverticulitis and he has to keep eating regularly and stated that the arm pain has never went away and it was still there. The patient did not have any emergency room/ physician office visit. The outcome of injection site pain (it doesn't stop him from doing anything) and different aches and pains, and back pain, nausea, upset stomach was not recovered. The outcome of muscle pain and joint pain was unknown. Therapeutic measures included acetaminophen (TYLENOL), 650 mg (Expiration: Jul2023 Lot: SJA033) for different aches and back pain which helped some but didn't take it all away. The patient was about to receive his second shot on 10Jun2021.