bad chills/terrible chills; terrible acid reflux for 3 hours; couldn't even walk, she had to crawl and her husband had to walk her around, she couldn't do anything; threw up; very dizzy/dizziness; vertigo; This is a spontaneous report from a contactable consumer (patient). A 70-year-old female patient received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE; lot number: EL8982, unknown expiration), via injection in right arm on 13Jan2021 at a single dose for COVID-19 prevention.  Medical history included ongoing vertigo (in car accident a little over 5 years ago, that affected a big nerve in left temple, and so every once in a while she will get vertigo so bad that she falls over), ongoing GERD (from a hiatal hernia; diagnosed many years ago), ongoing high blood pressure diagnosed about 15 years ago, ongoing bad cholesterol diagnosed 10 to 15 years ago, ongoing heart burn, ongoing hiatus hernia, and car accident a little over 5 years ago. Concomitant medications included ongoing omeprazole sodium (OMEPRAZOLE) for GERD, heart burn, and hiatal hernia (started this product at least 10 years ago; takes the product as needed if she is having heart burn or is going to eat spicy food); ongoing vitamin D3 for vitamin supplementation (started product about 8 months ago, because her doctor told her too, she guesses her vitamin was low); ongoing metoprolol for high blood pressure and to prevent stroke (started product at least 15 years ago; her BP could be regular but it could shoot up when she is upset, so she takes this to prevent stroke); ongoing hydrochlorothiazide for blood pressure (started product at least 5 years ago); pravastatin for bad cholesterol  (started the product at least 4 or 5 or more years ago); and ongoing acetylsalicylic acid (BABY ASPIRIN) to prevent stroke (has been taking this product forever, at least for 10 years).  The patient reported that she received the first COVID shot on 13Jan2021. She was okay on the 13th, 14th, and 15th. However, on the 16th (16Jan2021), she woke up and threw up once and was very dizzy for three days. She mentioned that she had like vertigo, she couldn't even walk, she had to crawl and her husband had to walk her around, she couldn't do anything. She had vertigo (16Jan2021). She was that way on Saturday and Sunday. On Monday, the patient's son took her to acupuncturist for her dizziness and was able to get up fine and walked away. After the acupuncture, she felt fine, like she was all better. On 19Jan2021 (reported as yesterday), she was fine. She woke up at midnight and had terrible acid reflux for 3 hours even though she had hardly eaten. She does take omeprazole for heart burn, and she had taken omeprazole earlier in the day, but it was just coming up, that acid and burning. She drank milk to coat the stomach and it went away at 03:00 AM. She had very bad chills/terrible chills (20Jan2021) and her teeth were chattering, she couldn't even talk, and couldn't control the chills. She is fine now. She clarified that she got vertigo from a car crash years ago and haven't had it in almost a year. Chills are not ongoing at this time, she has not had any for about 4 hours now, and she is hoping she is recovered completely, but it may be too soon to tell. She did not receive other vaccines on the same day as the COVID vaccine. The patient is wondering if all this could be from the vaccine. The patient wanted to know if it is safe to take the second shot. She was scheduled to receive the second dose on 03Feb2021. The patient recovered from the events threw up on 16Jan2021; unable to walk and vertigo on 18Jan2021; dizziness on 19Jan2021; and terrible acid reflux on 20Jan2021. While unknown outcome for chills.