stroke caused by a blood clot; stroke caused by a blood clot; right arm went completely numb; She is tired; shortness of breath; her eyes were blurry; her head felt like somebody put a spike in it on the right side; sore arm; This is a spontaneous report from a contactable consumer.  A 77-year-old female patient received the first dose of BNT162B2  (PFIZER-BIONTECH COVID-19 VACCINE), via an unspecified route of administration, administered in Arm Left on 06Feb2021 13:15 (Lot Number: EM9809) (at age of 77-year-old) as single dose for COVID-19 immunisation. Medical history included colitis ulcerative from Oct2020 (dropped weight, she dropped from 127 pounds to 109 pounds) , cardiac disorder, atrial fibrillation, and osteoporosis, all were ongoing. Concomitant medications included carvedilol taken for cardiac disorder, atrial fibrillation from an unspecified start date and ongoing; cyanocobalamin (VITAMIN B12) taken for cardiac disorder from 2018 (reported as has taking it close to 3 years) and ongoing; denosumab (PROLIA) taken for osteoporosis from an unspecified start date and ongoing; ubidecarenone (Q10) taken for cardiac disorder from unknown start date and ongoing; calcium, colecalciferol (CALCIUM + D3) taken for osteoporosis from 2020 (reported as a year ago) and ongoing; influenza vaccine (FLU VACCINE VII) taken for an unspecified indication, start and stop date were not reported, and vitamins NOS (MULTIVITAMIN) from an unspecified start date and ongoing, the patient started taking it when she was a senior in high school and stated because she is not the best eater in the world.  There was no prior vaccinations (within 4 weeks). AE(s) following prior vaccinations: The patient stated arm is sore with flu shot and probably did when she was little when she got the loaded shot, the mumps one. She wouldn't remember that because she was little.  The patient experienced stroke caused by a blood clot on 20Feb202114:30 with seriousness criteria hospitalization, sore arm on 07Feb2021, and right arm went completely numb, tired, shortness of breath, her eyes were blurry, her head felt like somebody put a spike in it on the right side on an unspecified date.  The event stroke caused by a blood clot result in emergency room visit.The patient was hospitalized for stroke caused by a blood clot from 23Feb2021 to 24Feb2021.  The patient reported that she received the first dose and she is thankful she got it on 06Feb2021 and the only side effect she had was a sore arm. Stated on 20Feb2021 she had a stroke caused by a blood clot obviously, she ended up in the hospital. She didn't think at the time, doesn't fault the physicians that took care of her. She didn't think it was related and her eldest son thought it was related. The patient stated they thought it was a mild stroke and after they did the C scan the neurosurgeon, while she was lying in the hospital bed, looked at her assistant and said he couldn't believe that she was talking and walking. The patient stated part of it was ignorance on her part, everyone thought it was the left side that numbs, but hers was the right side. Stated she didn't fall, she dropped something and went down to get it and her right arm went completely numb and she couldn't get back up and she tried to push with legs and couldn't get up. Stated  all of a sudden her eyes were blurry and then she never gets headaches and her head felt like somebody put a spike in it on the right side, stated  it is supposed to affect the left side. stated she has a heart problem. The patient stated she had a sore arm for about a week, lasted for a few days. stated she gets a  sore arm with the flu shot. stated when she would roll over to lay on her left side and roll over on that arm it was enough to wake her up. stated it lasted about 5 days. She couldn't figure out why it was lasting so long. Stated the second thing that happened was that she went to her son's home that night for dinner, hadn't told him about it and while she was eating dinner she asked am if she leaning to the left and he said yes, she was and that her words were being slurred and only lasted for about 10 mins. Stated she didn't call and ignorance is unreal with this stuff. She went to urgent care the next day and they didn't call the ambulance. When she went to the doctor on 23 Feb2021 she was sent immediately to Hospital so she could go through the ER and that's when the neurosurgeon became involved. Stated right now her balance isn't quite right but she is driving and she was  taking care of herself and they didn't send anyone home to help her. She was  not having any problem talking. Stated she was  not going to get into this and will beat it and get back to normal. She was tired a lot, which they said it's normal. Stated she was a real dynamite. Stated it is improving slowly, she was  extremely tired and not taking her long walk like she was  used to and has shortness of breath, she was  not trying to over do it. Stated she always gets a sore arm with the flu shot. Stated her pain level is lower than most people. The patient stated the sore arm started late evening but the next day was really hurting and the main thing was rolling over. The patient stated she didn't take anything for her sore arm, she won't even take an aspirin because some of these Advil medications will mix with the heart medications. Stated in the hospital they were giving her medications she had through an IV in her arm but doesn't know what was going through that. Stated they put her on a blood thinner and they were testing the blood thinner through the IV. She was so miserable,   she just wanted to go home and get a good nights sleep. Stated  they took all kinds of test, checked her oxygen and had to have a certain number before she could go home.  The patient received treatment for event stroke caused by a blood clot and not received treatment for  sore arm . The outcome of events stroke caused by a blood clot was resolving, of event sore arm was resolved on 12Feb2021, of other events was unknown.