Got a full blown reaction; Weakness; she felt dizzy; Feeling extreme cold, no way I was able to warm myself under warm blankets and heating pads; Chills; High fever; Sick; left arm with feeling extreme cold; Malaise; Headache; Nausea; Tired/ Getting a little weary; Little unsteady when I was walking; didn't faint; Slept most of the day; Anxious; This is a spontaneous report from a contactable Nurse (Patient). A 78-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Lot Number: EN6201), dose 2 intramuscular, administered in Arm Left on 15Mar2021 at 11:45 (Age at vaccination: 78 years) as dose 2, single for covid-19 immunisation. Medical history included hypertension. Concomitant medications included Labetalol 100 mg, tablet, twice a day, oral for Hypertension, Losartan 25 mg, tablet, twice a day, orally for Hypertension. Historical vaccine included bnt162b2 (COMIRNATY) as dose 1 on 23Feb2021 with lot number EN6201 on left arm, left deltoid for covid-19 immunisation. It was a subcutaneous needle in the left arm, she believes, she asked, how much it was, and she think they said 3 cc. The patient experienced sick, high fever, chills, left arm with feeling extreme cold on 15Mar2021, feeling extreme cold, no way she was able to warm herself under warm blankets and heating pads on 15Mar2021 at 22:00, she felt dizzy on 16Mar2021, malaise, headache, nausea, tired/ getting a little weary, little unsteady when she was walking; didn't faint, slept most of the day, anxious in Mar2021, weakness on 18Mar2021, got a full-blown reaction on an unspecified date. The patient underwent lab tests and procedures which included pyrexia: 102 fahrenheit on 16Mar2021 Temperature early in the morning , pyrexia: 101 fahrenheit on 16Mar2021 Her fever that afternoon was 101F , pyrexia: 100.8 fahrenheit on 16Mar2021 Her temp was staying at 100.8F, but never got back up to 102 , pyrexia: 100-99.8 fahrenheit on 17Mar2021 In the morning, after getting rest, her temperature dropped to 100F- 99.8F, pyrexia: 99 fahrenheit on 17Mar2021 99F on 17Mar2021 in the early evening. Reporter stated that she received her second Covid vaccine dose on March 15th and 10 hours later she was sick all night, 24 hours later she felt better and the next day she felt dizzy and was back in bed. She reports experiencing high fever, malaise, headache, nausea and weakness "can't get out of bed". She asks, do these symptoms wax and wane like this?She reports that she spoke with her doctor who was "clueless" and who advised her to take Ibuprofen and take a tepid bath. She stated that Was feeling perfectly well until she got the vaccine. She started approximately 10 to 11 hours post injection in her left arm with feeling extreme cold, no way she was able to warm herself under warm blankets and heating pads and then she started feeling very chills and nauseous and weak and then, when she says weak, just tired and feeling a little unsteady when she was walking but she didn't faint or anything like that. And then her fever went up to '102' (not confirmed) and she took Tylenol 500 mg because she was afraid to take Ibuprofen because the instructions were to take Tylenol. And the next morning, she woke up and her fever was, she thinks it was about 101 and she did take two more Tylenol and slept most of the day. The nausea started to subside. She felt a little headachy. And later in the day, she started to feel better. About 24 hours in she thought she was over it. She thinks it was miserable 24 hours, but she was now feeling better and last night, she was able to feel a little bit more like herself. So, this morning when she got out of bed, she got very, very dizzy, she had dizziness, not vertigo, not spinning when she moved her head. her temperature, she may feel well right now. She took two ibuprofen last night before she went to bed with a low-grade temperature of 99. So, she felt she just need to report this. She does not know what to expect, how much longer. She doesn't know if you have any parameters if you could be happy to share. She would like some professional opinion or advice. She would like to hear from you." Consumer further stated, "she only took one 500 mg and then she wasn't feeling that much better. So, she took it at bedtime. She took two Ibuprofen, 200 mg tablets. Thanks to a total of 400 mg Ibuprofen and that brought her fever down. So, in the morning it was, her fever was 98 or so. She was very happy with that and then during the day, she felt quite good. The 16th she was very sick, the 17th she felt quite good after taking the Ibuprofen. In the morning, she didn't feel great, but she was up and about, and she ate normal food and her temperature at bedtime was 99 and she thought she was over all this and then this morning, she woke up with quite a bit of dizziness. She didn't take anything because she didn't think it was indicated, she didn't have a fever. She didn't take anything but just fluids, 'ginger ale' (not clarified further). She did have a breakfast, she thought my blood sugar was down, she had age and a toast and she also had the coffee for the first time in 3 days."Consumer further stated, "Six hours later she  took one and then 6 hours after that, she  took two Motrin." Therapy was given for High fever and Headache. The outcome of High fever was recovered on 17March2021. The outcome of the rest of the events were unknown.  Causality: Consumer stated, "Absolutely, yes, it was right after the shot. She was perfectly healthy and fine before she got the shot. No symptom or allergy, no fever, nothing. They take your temperature by the way. As soon as you go in, they check you and ask you for all that information."  No follow-up attempts are needed. No further information is expected.