she went into afib (atrial fibrillation); chills; fever; teeth banging together; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 65-year-old female patient received pneumococcal 13-val conj vac (dipht CRM197 protein) (PREVNAR 13), on 07Jun2022 at 15:00 as 0.5 ml (Lot number: EE3120) at the age of 65 years intramuscular, in left arm for pneumonia. The patient's relevant medical history included: "Diabetes" (unspecified if ongoing), notes: Diabetes Initially was diagnosed with pre-diabetes and was placed on the three medicines and they work well together. She is on a third medicine too and it controls the diabetes. Concomitant medication(s) included: METFORMIN taken for diabetes mellitus (ongoing); SIMVASTATIN (ongoing). Vaccination history included: Pneumonia vaccines administration date: 2006 for immunisation; Pneumonia vaccines administration date: 2012 for immunization (She has had two other pneumonia vaccines in the past and had no reactions to those, but those were made by Merck. She had the previous doses 2006 and 2012). The following information was reported: TOOTH DISORDER (non-serious) with onset 07Jun2022, outcome "recovered" (08Jun2022), described as "teeth banging together"; CHILLS (non-serious) with onset 07Jun2022 at 23:00, outcome "unknown"; PYREXIA (non-serious) with onset 07Jun2022 at 23:00, outcome "unknown", described as "fever"; ATRIAL FIBRILLATION (medically significant) with onset 08Jun2022, outcome "recovered", described as "she went into afib (atrial fibrillation)". The event "she went into afib (atrial fibrillation)" required emergency room visit. The patient underwent the following laboratory tests and procedures: Heart rate: normal, notes: the next day her heart rate came back to normal; rapid, notes: rapid heartbeat are side effects related to the Prevnar 13 vaccine. Therapeutic measures were taken as a result of atrial fibrillation.  Additional information: Patient explained she went to bed that night on 07Jun2022 and she had bad chills, teeth banging together, and fever. Soon as she laid down her heart was flopping all over. She called 9-1-1 and  arrived in emergency room 2:40 AM. When she laid down it was just going on 2:00 in the morning which was normal for her because she is a night owl. The chills and fever started around 11:00 the night of 07Jun2022. Chills and Fever, still had it when she went to the ER, but does not really remember when it went away. Soon as she got the ER she was placed on an IV. Patient Felt like she has recovered. The teeth banging together got worse as the a-fib started. She went by the ambulance to the ER and clarified she came home on 08Jun2022 between 09:30 and some where in 10:00 when her son picked her up. She was in the emergency room the entire time. She clarified her heartrate came back down by the time she left the emergency room on 08Jun2022. It took three hours to come out of A-Fib. Then it took a while to normalize. They were able to control with some IV medicine . Patient was placed on Pradaxa 150mg capsule twice a day by mouth as treatment which she is still taking. When probed for outcome she stated this has only occurred once in her life. It was only after the pneumonia vaccine, Prevnar 13. Teeth banging together lasted about half an hour after being in the emergency room. She thought she was having a heart attack.