some aches in his left costochondral area, or left chest area, and his left arm; First two doses of the Covid 19 Vaccine were Moderna; got the Pfizer Covid 19 Vaccine Booster dose; He received his Pfizer COVID booster dose 28Oct2021; First two doses of the Covid 19 Vaccine were Moderna; got the Pfizer Covid 19 Vaccine Booster dose; sore arm/Arm ache; muscle pain; aches and inflammation of joints; aches and inflammation of joints; This is a spontaneous report received from a contactable reporter(s) (Physician) from medical information team. The reporter is the patient. Other Case identifier(s): US-PFIZER INC-202101595911 (Pfizer).  A 72 year-old male patient received bnt162b2 (BNT162B2), administration date 28Oct2021 13:30 (Lot number: FG3527, Expiration Date: 28Feb2022) at the age of 72 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "retired" (unspecified if ongoing), notes: Caller is retired. The patient's concomitant medications were not reported. Vaccination history included: Moderna vaccine (His first COVID vaccination was on 04Feb2021 with lot number 012M20A, manufacturer Moderna.), administration date: 04Feb2021, when the patient was 71 years old, for Covid-19 immunization; Moderna vaccine (His second dose, was on 04Mar2021, lot number 014M20A, manufacturer Moderna.), administration date: 04Mar2021, when the patient was 72 years old, for Covid-19 immunization. The following information was reported: OFF LABEL USE (non-serious), INTERCHANGE OF VACCINE PRODUCTS (non-serious) all with onset 28Oct2021 13:30, outcome "unknown" and all described as "First two doses of the Covid 19 Vaccine were Moderna; got the Pfizer Covid 19 Vaccine Booster dose"; IMMUNISATION (non-serious) with onset 28Oct2021 13:30, outcome "unknown", described as "He received his Pfizer COVID booster dose 28Oct2021"; PAIN IN EXTREMITY (non-serious) with onset 28Oct2021, outcome "unknown", described as "sore arm/Arm ache"; MYALGIA (non-serious) with onset 2021, outcome "unknown", described as "muscle pain"; ARTHRALGIA (non-serious), ARTHRITIS (non-serious) all with onset 2021, outcome "unknown" and all described as "aches and inflammation of joints"; CHEST PAIN (non-serious) with onset 29Oct2021, outcome "unknown", described as "some aches in his left costochondral area, or left chest area, and his left arm". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of myalgia, arthralgia, arthritis.  Additional information: It was reported that Caller is a retired Physician who received the booster dose of the Pfizer COVID-19 vaccine yesterday and "other than a sore arm, he was fine from that". Caller also stated that "in doing stuff, he had muscle pain, aches and inflammation of joints as he did a little more than what he usually does". Caller stated that he "typically takes Tylenol or NSAID for this but he was advised not to take it before getting the booster dose as he wants the booster dose to have full effect". Transferring agent states the caller was calling with a medical inquiry about taking Tylenol or NSAIDS. Caller wanted to know if there is any information if he can take Tylenol or NSAID now or if he should wait for a couple of weeks before taking it. Caller states that he got the vaccine yesterday at around 1330. In the evening he had an arm ache. He woke up this morning and his arm felt much better after all he had done for it was put ice on it. He woke with some aches in his left costochondral area, or left chest area, and his left arm. He thinks it is because yesterday he did some lifting of a card table that he had never done before. Caller says he thinks that discomfort is from lifting the card table. Caller states that the ice didn't do much. He might try a heating pad. He called Pfizer to see if it was a good idea to take Tylenol or NSAIDS after the vaccine since they don't recommend using it before the vaccine. Caller states he does not think that he is having side effects from the vaccine. He thinks his pain is from the extra lifting that he did of the card table up into a box. Says that if anything persists or worsens he will call back. He received a letter from Pfizer because he did receive his booster dose of the Pfizer COIVD-19 vaccine on 28Oct2021 and then the next day he did lift something over his head, that he does not usually do and he is 72 years old and felt some pain in the cost chondral area and figures it is muscular skeletal and somehow in the process of filing out a survey it must have come across as an adverse event as aches and pains after getting the booster dose. But he received a letter dated 03Nov2021 asking questions about the adverse event but the questions seem to be directed as if he was the treating physician who made the report and he is the patient plus he does not feel this is an adverse event of the booster dose. There has been a little confusion. He is a retired physician. He received paperwork as if he was the physician. He is the patient. He is wondering if that could be cleared up. He received his Pfizer COVID booster dose 28Oct2021. The next day, he had soreness. He doesn't think it wasn't an adverse event. He feels like it was related to what he lifted. He doesn't even think it should have been reported now. Caller is retired. The caller confirmed the details provided by the transferring agent. He would like to share information. He should have waited a day or two to report. His manufacturer report number is 202101482964. He got the Pfizer COVID booster having had Moderna for his first two shots around 04Mar2021. He did that for a reason. Where he lives, he is enrolled in testing after the COVID vaccine to check for antibodies. He was supposed to take antibody tests for 4 months after the vaccine. After his two doses of Moderna, his antibody levels were 0, there were none. When it was time for the booster, he did some research, and he found an article that suggested there is no downside to switching to Pfizer for the booster. That actually there could be an upside to switching. His Pfizer booster shot had NDC: 59267-1000-02. He is wondering if Pfizer will just cross his report off since he doesn't think his soreness was related to the vaccine at all. He had retained antibody testing four months apart. They scanned his result, but said the test had expired. He knew that. It was reassuring to him to see he had antibodies. He tested negative for antibodies after both Moderna doses. He even paid to get tested at the pharmacy who said he was negative as well.His doctor also told him antibodies aren't the most important, but the t cells and b cells are. He just feels it is nice to see an antibody response after the booster. Follow-up attempts are completed. No further information is expected.