chest heaviness, fullness; heart rate increased; she had flutters and was skipping a beat; she had flutters and was skipping a beat; her blood pressure was really high, 168 or 178/94; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from agency. The reporter is the patient.  A 64-year-old female patient received pneumococcal 20-val conj vac (dipht CRM197 protein) (PREVNAR 20), as dose number unknown, single (Batch/Lot number: unknown) for immunisation. The patient's relevant medical history included: "Reaction to the flu shot" (unspecified if ongoing), notes: because in the past she had a reaction to the flu shot when they started preserving it; "Anxiety" (unspecified if ongoing). The patient's concomitant medications were not reported. The following information was reported: HYPERTENSION (medically significant) with onset Nov2022, outcome "recovering", described as "her blood pressure was really high, 168 or 178/94"; CHEST DISCOMFORT (medically significant), outcome "unknown", described as "chest heaviness, fullness"; HEART RATE INCREASED (medically significant), outcome "unknown"; CARDIAC FLUTTER (medically significant), EXTRASYSTOLES (non-serious), outcome "unknown" and all described as "she had flutters and was skipping a beat/did an EKG and that showed it was okay, with a few flutters or "occasions" per the doctor". The patient underwent the following laboratory tests and procedures: Blood pressure measurement: 168 or 178/94, notes: her blood pressure was really high, 168 or 178/94; Electrocardiogram: okay, with a few flutters or occasions; Heart rate: Increased/speeded up.  Additional information: The caller stated she reported to Pfizer what happened with her side effects from taking prevnar20 vaccine. She talked to her doctor about it and the doctor said "I don't think it can do that." She felt fine before the pneumonia vaccine and she took other vaccines didn't didn't have the problem she had. The side effects didn't happen until exactly a week after the vaccine. Her heart rate increased and she was just watching a movie. She told her husband her heart rate was "speeded up." They checked it and her blood pressure was really high, 168 or 178/94. She sat for a few minutes and got better but a few hours later it did it again and has been off and on since 14Nov. She went to her medical doctor and they did an EKG and that showed it was okay, with a few flutters or "occasions" per the doctor. She had to wear a heart monitor for a couple days and that said she had flutters and was skipping a beat, but the doctor said it is normal to have occasions. It is not so much the flutters, it is the heaviness on her chest and fullness going and coming. She knows it is not anxiety, she has had anxiety before and it is nothing at all like it. She did see on there when she was looking it up Prevnar 20 that one of the more serious side effects mentioned about heart rate and fullness. She is real careful what vaccines she takes as long as it is preservative free because in the past she had a reaction to the flu shot when they started preserving it. The pharmacist told her it was preservative free for the Prevnar 20 so she is not sure if it is because it is a strong vaccine. The only reason she took it was when her daughter was 9 months old she had pneumonia and now she is old enough to be eligible.  The information on the batch/lot number for pneumococcal 20-val conj vac (dipht CRM197 protein) has been requested and will be submitted if and when received.