Slight headache; Flu like symptoms; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non-HCP). The reporter is the patient.  A 66-year-old patient received bnt162b2 (BNT162B2), intramuscular, administered in arm left, administration date 22May2021 10:30 (Lot number: EW0169) at the age of 66 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "Suspected silent acid reflux" (unspecified if ongoing), notes: Suspected silent acid reflux. I took two Rolaids and a tablespoon of a grocery store brand of Mylanta. I got almost instant relief.; "Asthma" (unspecified if ongoing), notes: my asthma symptoms normally appear if I have been exposed on strong chemical smell strong cleaning products, perfumes, gasoline, diesel, propane and Because of my husband's extreme asthmatic condition our house is scent free.; "Hiatal Hernia" (unspecified if ongoing); "Double heart bypass", start date: Apr2019 (unspecified if ongoing); "Heart Stent", start date: Jun2018 (unspecified if ongoing), notes: (Privacy) surgery; "Complete Knee (right) replacement", start date: May2019 (unspecified if ongoing); "Blood pressure" (unspecified if ongoing); "Heart" (unspecified if ongoing). Concomitant medication(s) included: TRIAMTEREEN/HYDROCHLOORTHIAZIDE taken for blood pressure measurement (ongoing); BABY ASPIRIN taken for cardiac disorder (ongoing); ADVAIR taken for asthma (ongoing); BUDESONIDE; FORMOTEROL FUMARATE DIHYDRATE taken for asthma; VENTOLIN HFA taken for asthma; MYLANTA AR; BENADRYL. Past drug history included: Carisoprodol, reaction(s): "Allergy"; Chlorzoxazone, reaction(s): "Allergy"; Darvocet, reaction(s): "Allergy"; Codiene, reaction(s): "Allergy"; Plavix, reaction(s): "Allergy"; Crestor, reaction(s): "Allergy"; Diclofenac sodium dr, reaction(s): "Allergy"; Vimovo naproxen and esomeprazole magnesium, reaction(s): "Allergy"; Celecoxib, reaction(s): "Allergy"; Calcium tablets or anything with calcium in it, reaction(s): "Allergy"; Calcium, reaction(s): "IBS", notes: I was diagnosed with IBS 14 years ago and hear it was one of the above meds had calcium in it; Large doses of aspirin, reaction(s): "Allergy". Vaccination history included: Bnt162b2 (Dose: 1, Time: 09:30AM, Anatomical Location: Left arm, Route of administration: Intramuscular, Batch/lot number: EW0161), administration date: 01May2021, when the patient was 66 years old, for Covid-19 Immunization, reaction(s): "Pressure in middle of chest", "felt like someone was taking a tip of pin barely touching on skin", "felt sort of weird", "Wheezing", "Coughing", "slight headache", "Tired feeling", "Pains in my chest, in the middle of my back", "Pains in my chest, in the middle of my back"; Bnt162b2 (Dose: 1, Time: 09:30AM, Anatomical Location: Left arm, Route of administration: Intramuscular, Batch/lot number: EW0161), administration date: 01May2021, when the patient was 66 years old, for COVID-19 Immunization, reaction(s): "Took my BP it was 175/90". The following information was reported: HEADACHE (non-serious) with onset May2021, outcome "recovered" (May2021), described as "Slight headache"; INFLUENZA LIKE ILLNESS (non-serious) with onset May2021, outcome "recovered" (May2021), described as "Flu like symptoms". Relevant laboratory tests and procedures are available in the appropriate section.  Additional information: Patient received shot at approximately 10AM, at listed location and had reactions to medications before so was told to wait 30 minutes. While waiting patient felt a small barely noticeable pressure in middle of chest hindsight it felt like someone was taking a tip of pen barely touching your skin. Again, it was barely noticeable and just felt sort of weird. Patient thought that the mind was playing tricks didn't really know what to explain so patient did not say anything to the nurse. As patient was driving home it started wheezing and coughing for about 20 minutes from the site where patient received shot by the time and got home was wheezing a lot. Around 8 PM that night patient had pains in chest, in the middle of the back and was wheezing. Patient took BP it was 175/90 was just about ready to go to the emergency room. At that point patient took two Rolaids and a tablespoon of a grocery store brand of Mylanta. Patient got almost instant relief and continued to have on and off symptoms of acid reflux for about 2 weeks. Just took the store brand of Mylanta.  No follow-up attempts are possible. No further information is expected.; Sender's Comments: Linked Report(s) : US-PFIZER INC-2021488055 PFIZER