shot hurt her arm so bad/arm pain; Super tired; she just didn't feel right, she was not feeling normal; Not feeling good; worst headache/terrible headache/head was throbbing/all the blood went to her head; thought that she was going to throw up the entire time/she almost threw up/nauseous; Chills; she was miserable, and she has never been so sick; allergic reaction; feel weak; Fever; issues with her muscles in her body; joints were swollen/wrist and knee joints had swollen up; joints were achy; awake for about 24 hours because she couldn't sleep; This is a spontaneous report received from a contactable reporter (consumer) from Medical Information Team. The reporter is the patient.  A female patient received BNT162b2 (PFIZER BIONTECH COVID-19 VACCINE, solution for injection), administration date 13Apr2021 (lot number EW0158) as dose 2, single for covid-19 immunisation. The patient had no relevant medical history. There were no concomitant medications. Vaccination history included: BNT162b2 (PFIZER BIONTECH COVID-19 VACCINE) (first dose, lot number ER2613), administration date: 23Mar2021, for covid-19 immunization, reaction(s): "sore arm", and "couldn't sleep". The following information was reported: PAIN IN EXTREMITY (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "shot hurt her arm so bad/arm pain"; FATIGUE (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "super tired"; FEELING ABNORMAL (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "she just didn't feel right, she was not feeling normal"; MALAISE (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "not feeling good"; HEADACHE (non-serious) with onset 13Apr2021, outcome "recovered" (14Apr2021), described as "worst headache/terrible headache/head was throbbing/all the blood went to her head"; NAUSEA (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "thought that she was going to throw up the entire time/she almost threw up/nauseous"; CHILLS (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "chills"; ILLNESS (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "she was miserable, and she has never been so sick"; DRUG HYPERSENSITIVITY (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "allergic reaction"; ASTHENIA (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "feel weak"; PYREXIA (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "fever"; MUSCLE DISORDER (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "issues with her muscles in her body"; JOINT SWELLING (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "joints were swollen/wrist and knee joints had swollen up"; ARTHRALGIA (non-serious) with onset 13Apr2021, outcome "recovered" (25Apr2021), described as "joints were achy"; INSOMNIA (non-serious) with onset 2021, outcome "recovered" (2021), described as "awake for about 24 hours because she couldn't sleep". Therapeutic measures were taken as a result of headache which included aspirin.  Additional Information: The patient wanted to know if her side effects would be considered as a severe allergic reaction. She also wanted to know if she should receive the booster dose. She informed that she got her second dose of the vaccine around 8-9 AM on 13Apr2021 and she went to work afterwards, and she was fine at work and then got off at 3 PM. She stated that she has never had a shot hurt her arm so bad, but that was it. She didn't feel sick but thought maybe she was just tired, she just didn't feel right, she was not feeling normal, and she was not feeling good. She wasn't in pain; she was just super tired and not feeling normal. She added that she had been running around all day and she was a hyper person, so maybe she was putting it off when she was running around all day. Then she went to bed at 10 PM and that was usually early for her; she was so tired that it was unbelievable. The minute she laid down it triggered everything. It was weird, she thought maybe it was because she was lying down and all the blood went to her head or something, but it began the minute that she had laid down. It was like instant pain as she had the worst headache/terrible headache and her head was throbbing, and no amount of aspirin or cold compress or ice relieved the pain; it was really awful that she thought she was going to die. She also thought that she was going to throw up the entire time, she had chills, she was miserable, and she has never been so sick. She didn't go to work that next day, she was just in bed. Her headache finally disappeared after 24 hours which made a huge difference for her because she felt like she couldn't function. Then on the third morning she tried going to work but didn't feel great. On her way to work she almost threw up/she felt like she was going to throw up and she was nauseous. Her work told her to go back home so she went back home. She didn't go to work for 3 days. Then everything was gone the "next day". All together the worst of it was for 38 to 40 hours. She got over that and thought she was one of the unlucky ones. She thought maybe that she had an allergic reaction. She was not allergic to anything that she knows of and she doesn't know what she would be allergic to. She had no difficulty breathing, her face and throat didn't swell, she forgot about having any side effects with her heart, she had no rash, she did feel weak, she had no chest pain, and she had no shortness of breath. She had the terrible arm pain for days. She had a violent headache and that was the worst one she has ever had. She had a fever, and she thought that her headache was from the fever. She had issues with her muscles in her body. Her joints were swollen and achy, wrist and knee joints had swollen up, and she just had everything. She didn't vomit but she kept on feeling like she was going to vomit. She was awake for about 24 hours because she couldn't sleep. She wants to have the booster so that she won't get Covid, but she wanted to know if it was going to kill her. All the side effects lasted for a few days before they went away.   No follow-up attempts are possible. No further information is expected.  Follow-up (08Dec2021): Follow-up attempts are completed. No further information is expected.; Sender's Comments: Linked Report(s) : PFIZER INC-202101731380 same patient/drug, different vaccine dose/events