After the booster, he had "horrific joint pain.; I could hardly move for a couple of days".; He states, "the problem is I don't know if the flare was because of the booster shot, or because I stopped taking the Xeljanz for a week".; Rheumatoid arthritis flare up; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team, Program ID. The reporter is the patient.  An 82-year-old male patient received tofacitinib citrate (XELJANZ XR), (Lot number: FA0918, Expiration Date: 31Aug2023) at 11 mg 1x/day for rheumatoid arthritis; BNT162b2 (BNT162B2), on 08Mar2022 as dose 4 (booster), single (Lot number: FM0698, Expiration Date: 31May2022) at the age of 82 years, in left arm for covid-19 immunisation. The patient's relevant medical history included: "diagnosed allergies" (unspecified if ongoing); "compromised immune status" (unspecified if ongoing); "respiratory illness" (unspecified if ongoing); "genetic/chromosomal abnormalities" (unspecified if ongoing), notes: genetic/chromosomal abnormalities; "endocrine abnormalities" (unspecified if ongoing); "diabetes" (unspecified if ongoing), notes: endocrine abnormalities (including diabetes); "obesity" (unspecified if ongoing); "compromised immunity" (unspecified if ongoing); "Rheumatoid arhtritis" (unspecified if ongoing). There were no concomitant medications. Vaccination history included: BNT162b2 (DOSE 3 (BOOSTER), SINGLE, LOT: FC183, EXPIRATION: 31Oct2021), administration date: 23Aug2021, when the patient was 82-year-old, for Covid-19 Immunization, reaction(s): "Covid-19"; BNT162b2 (DOSE 2, SINGLE, LOT: EN6203, ANATOMICAL LOCATION: LEFT ARM), administration date: 23Feb2021, when the patient was 81-year-old, for Covid-19 Immunization, reaction(s): "Covid-19"; BNT162b2 (DOSE 1, SINGLE, LOT: EL9265, ANATOMICAL LOCATION: LEFT ARM), administration date: 30Jan2021, when the patient was 81-year-old, for Covid-19 Immunization, reaction(s): "Covid-19"; shingrix (50mcg first Shingrix), administration date: 26Jul2021, for Immunisation; shingrix (second Shingrix), administration date: 28Sep2021, for Immunisation; flu (flu shot), administration date: 18Oct2021, for Immunisation. The following information was reported: CONDITION AGGRAVATED (non-serious) with onset 18Mar2022, outcome "recovered" (22Mar2022), described as "Rheumatoid arthritis flare up"; ARTHRALGIA (non-serious), outcome "unknown", described as "After the booster, he had "horrific joint pain."; MOVEMENT DISORDER (non-serious), outcome "unknown", described as "I could hardly move for a couple of days"."; ARTHRITIS (non-serious), outcome "unknown", described as "He states, "the problem is I don't know if the flare was because of the booster shot, or because I stopped taking the Xeljanz for a week".". The action taken for tofacitinib citrate was temporarily withdrawn.  Additional information: Reported as, On 29Jun2022- PCV(Pneumococcal conjugate vaccine). No prior Vaccinations within 4 weeks. He reported he had his 2nd booster on 08Mar2022 and that his rheumatologist told him to stop taking Xeljanz for 2 week before the booster shot. After the booster, he had horrific joint pain. He could hardly move for a couple of days. He stated the problem is he don't know if the flare was because of the booster shot, or because he stopped taking the Xeljanz for a week. He has been on Xeljanz XR for about 5 years. He was close to having to go to the ER or doctor's office because of his flare up. A year before he did get Shingrix- 2021.  He was fairly sick from that, but did not have joint. He just had pains for a couple of days.