Tiredness; Headaches; Chills; Fever; Nauseated; Dizziness; Weakness; felt sick; can't see as good, her eyes are weak; Difficulty breathing; thought she was having a heart attack; dehydrated; fast heart beat that felt like her chest was full; fast heart beat that felt like her chest was full; Injection Site Pain; blood pressure fluctuated; This is a spontaneous report from a contactable consumer (patient). A 70-year-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, solution for injection), dose 1 via an unspecified route of administration, administered in left arm on 27Feb2021 12:00 (lot number: EN6202; expiration date: 30Jun2021) as single dose for COVID-19 immunisation. Medical history included ongoing high blood pressure and stroke from 2012 to an unknown date. Concomitant medications included aspirin [acetylsalicylic acid] (ASPIRIN) taken for stroke from 2012 and ongoing; clopidogrel bisulfate (CLOPIDA) and simvastatin both taken for high blood pressure from 2012 and ongoing; ongoing amlodipine, lisinopril, and metoprolol all taken for high blood pressure. On 27Feb2021, she took the first vaccine. From that day, for 2 days, she had injection site pain. On 07Mar2021, she started having tiredness, headaches, chills, fever, felt nauseated, had a fast heart beat that felt like her chest was full and thought she was having a heart attack, dizziness, weakness, felt sick, and difficulty breathing. The patient added that she can't see as good, her eyes are weak. She was going to make an appointment to get her eyes checked. For dizziness event, she has to sit on the side of her bed for 10 minutes and she was still dizzy. She has to hold on to something because she feels like she is going to fall. She was given meclizine three times a day for this event. For tiredness event, she stated that it fluctuates during day. After she takes a paracetamol (EXTRA STRENGTH TYLENOL) and lays down for a while, she feels ok and then she feels tired again. For fast heart beat that felt like her chest was full and thought she was having a heart attack event, it comes and goes, she had it yesterday (21Mar2021) but hasn't had it today (22Mar2021) but she doesn't know if it is gone. Her symptoms were usually in the morning when she first gets up. She has been to the emergency room (ER) on 07Mar2021 and on 13Mar2021 and they say that nothing is wrong. On 07Mar2021, they gave her an IV because they thought she was dehydrated. On 13Mar2021, she went back to another hospital ER. She felt worse and her son came and got her and took her to the ER. They did a whole workup MRI of her head, x rays, blood work and everything. They didn't know what was causing it because it had it been over a week since her vaccine and they sent her home. She has been laying down and staying hydrated. She couldn't hardly get up and they asked her what has she done different and the only thing different was the vaccine. Everything listed on the risk factors [side effects] is how she is feeling. She was not hospitalized, they gave her medicine and told her to stay hydrated and sent her home and was told to follow up with her physician. She finally got an appointment for tomorrow (23Mar2021) with her physician. She can't drive because of the dizziness. All of her tests came back normal. They said her blood pressure fluctuated on 2021 but that is normal. Outcome of the injection site pain was recovered on 01Mar2021, of the difficulty breathing was recovering, of the headache, chills, fever, dizziness, weakness, and felt sick was not recovered, while of the remaining events was unknown.