scratchy throat; ear ache; mild headache; Heart racing; dizziness; heart flip flopped and sped up, that lasted 10 minutes; gassy and reflux type chest pressure with feeling trouble breathing/Difficulty breathing; gassy and reflux type chest pressure with feeling trouble breathing; allergic reaction; This is a spontaneous report from a Pfizer sponsored program. via contactable consumer or other non hcp. A 55-year-old male patient received bnt162b2 (BNT162B2, Formulation: solution for injection, Batch/Lot Number: EW0158 and expiry date was not reported) via intramuscular route of administration, administered in Arm Left on 26Apr2021 at 10:00 as dose 1 single, for covid-19 immunisation, (received the first dose of the Pfizer vaccine a week ago today, I had some reactions to the first shot, and am trying to determine whether or not to get the second shot). Patient medical history allergy to Penicillin diagnosed 2 years ago. He was advised as a child he was allergic to it, but the local medical provider wanted to actually prove if he was actually allergic and he was tested to verify. He was also allergic to the carrier that they give it to you in. Concomitant medication included cetirizine hydrochloride (ZIRTEC, Batch/Lot number and expiry date was not reported), 1 tablet daily for allergies (Started within the last year). There was no prior Vaccinations (within 4 weeks) and no AE following prior vaccinations. There was no history of previous immunization with the Pfizer vaccine considered as suspect (or patient age at first and subsequent immunizations if dates of birth or immunizations are not available). There was no family history. There was no relevant test. He did not take prior vaccination. The patient experienced within 5 minutes had dizziness on 26Apr2021 at 10:05, and my heart flip flopped and sped up, that lasted 10 minutes. I went home and later in the day I had mild headache on 26Apr2021 at 12:00 that came and went away after about 5 minutes, then on26Apr2021 at 12:05,  ear ache lasted about the same amount of time and then on 26Apr2021 at 12:10 a scratchy throat and that went away, on Apr2021 gassy and reflux type chest pressure with feeling trouble breathing on 26Apr2021 that was later in the day and carried into the majority of the next day and Within 5 minutes of getting shot, he had the dizziness and heart racing.  Difficult breathing was at 14:00. It was worse the following morning at 10:00. That is when he took Tums and Benadryl and by 14:00, they resolved. Headache was at 12:00 This would go away and then earache and then scratchy throat and then difficulty breathing. Ear Ache at 12:05, Scratchy throat at 12:10. There was no ER or physician's office required. Dizziness at 10:05, Heart racing at 10:05. The reporter states, He received the first dose of the Pfizer vaccine a week ago today, had some reactions to the first shot, and trying to determine whether or not to get the second shot. He had the shot at 10am, within 5 minutes had dizziness, and my heart flip flopped and sped up, that lasted 10 minutes. He went home and later in the day he had mild headache that came and went away after about 5 minutes, then he had an ear ache lasted about the same amount of time and then a scratchy throat and that went away, had gassy and reflux type chest pressure with feeling trouble breathing that was later in the day and carried into the majority of the next day. He saw in an article that a man who was hospitalized, they gave him Pepcid, and epinephrine, and Benadryl. So he took 3 tums, and two Benadryl and within a few hours symptoms decreased and felt fine. Looking at the vaccination facility where we got the vaccine, it states, there was a remote chance of severe allergic reaction. He wasn't hospitalized, etc. He did reach out, because he have tested for Penicillin reaction, he spoke to his allergy doctor, so they aren't very helpful. they said to front load with an antihistamine. They consider a severe allergic reaction if he were hospitalized and intubated. Reporter wanted to know if there was anything that has to go on the vaccination card, as to why he may not have received the 2nd dose, like if it was due to an allergic reaction. Within 5 minutes of getting shot, he had the dizziness and heart racing. It lasted 5-10 minutes. It felt like his heart flip flopped and it could have just been an increase in heart rate. The difficulty breathing happened after he came home and it was about 2 hours after the shot. Before that, he had a headache that only lasted a few minutes and it went away. Then an ear ache, which was 5 minutes after that. Then he had a scratchy throat and that went away, then the breathing portion of it kind of started that day and it continued and got worse until the next morning. It felt like he had gas and/or reflux type feeling and it was harder to take a deep breath. He saw online where someone had been treated for the same thing and was given Epinephrine, Pepcid and Benadryl. He does not know the person and read about this individual that was treated for it. He does not have any information to report for this person. Patient stated he took 3 Tums and 2 Benadryl and it resolved within a couple of hours the following morning from having taken the shot. He was allergic to penicillin diagnosed previously and was concerned about getting the shot but they said he would be fine. He had dizziness, and heart racing that lasted 10 minutes. He also was having difficulty breathing and had reflux for 8 hours for which he took a Benadryl. He would like to know if he can get second dose after experiencing side these effects. On the factsheet, it said this would be considered a severe reaction. He does not have a date, manufacturer, lot or expiration for the penicillin he was allergic to. He got tested in the last 2 years at University and tested that he was actually allergic. He later stated it was suggested in childhood that he was allergic, but never properly diagnosed until a couple of years ago. The outcome of event (dyspnoea, dizziness , ear pain, throat irritation, palpitations and Headache) was recovering and rest of events were unknown.   Follow-up attempts completed. No further information expected.