my heart felt like I had a couple cups of coffee/or taken a huge dose of prednisone/my heart beating like a jackhammer/Heart beating really hard and fast; my heart felt like I had a couple cups of coffee/or taken a huge dose of prednisone/my heart beating like a jackhammer/Heart beating really hard and fast; flushed face (hot and red); flushed face (hot and red); flushed face (hot and red); Anxious/Worried; I'm nervous; This is a spontaneous report from a contactable consumer or other non hcp. This consumer (Patient) reported that a 70-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Batch/Lot number: EP7534), dose 1 via an unspecified route of administration, administered in Arm Left on 17Mar2021 11:00 (Age at vaccination 70 years) as dose 1, single for covid-19 immunisation. Medical history included Covid-19, slight cold and antibodies. The patient's concomitant medications were not reported. The patient previously took prednisone and experienced heart rate increased, prednisone and experienced erythema, prednisone and experienced hot flush. On 17Mar2021, the patient experienced my heart felt like i had a couple cups of coffee/or taken a huge dose of prednisone/my heart beating like a jackhammer/heart beating really hard and fast; flushed face (hot and red) and anxious/worried. The patient underwent lab tests and procedures which included heart rate: really hard and fast on 17Mar2021. Case was not serious. It was reported that Caller (female, age 70 will be 71 next month) stated "I received my first injection Pfizer vaccine. I didn't have a reaction right away. As I was driving home, my heart felt like I had a couple cups of coffee.. or taken a huge dose of prednisone, my heart beating like a jackhammer, flushed face (hot and red). I didn't have nausea and headache. Now it's a little tiny bit, I'm nervous didn't know what to do and will I have another one in 3 weeks. I was worried about my health last night; that's what I'm concerned about. I did have covid in November. I'm surprised I had side effects. It's been 3 and 1/2 months. When I had covid I felt like I had a slight cold. Did that affect it. I'm tired of not having information. I have the antibodies; I wish I hadn't done it (received the vaccine) because nobody knows. It's a very confusing thing. One doctor told me to get it. My other doctor said not to get it. A pharmacist said don't worry about it until later. I was really worried because I didn't know what's happening after, since it was later in the afternoon I had it done at 11 in the morning. If that was normal, if I should have the second vaccine, if I should have gone to the emergency room. Facility name where the vaccine was administered at sport complex. Consumer stated, "I am anxious because of what happened yesterday because when I read what the difference side effects can be nothing like what I experienced was listed and I read the form that they handed me and it said that you have raising heart rate and all that type of thing then that's a severe allergic reaction. So I am concerned as to what was happening and should I, what will happen with my second shot and should I have seen gone to a doctor for assurance something after I have those sever reaction. And that did not happen later in the afternoon but it lastly till after midnight. When confirmed that the heart is racing, consumer stated, "Have you ever taken Prednisone. I am just asking you personally if you ever experienced taking Prednisone because it was I have the same reaction yesterday as I have when I have ever in the past have to take prednisone. Your face gets really hot and red and your heart beats really hard and fast and that's what I had and it did not happen within the 15 minutes that I waited after the shot, it happen later on and it continued till after midnight. The clinical outcome of event anxious/worried and nervous ness  was unknown; while other events outcome were recovered on unspecified date in Mar2021.  No follow-up attempts are possible. No further information is expected.