check her own self with her hand and it was like she put her hand on a stove; Allergic reaction; felt bad after taking the first dose-flu like symptoms /achy like flu symptoms; had high fever/feverish; urine became yellowish-brown; had a little diarrhea symptoms; get sick; vomiting; has a really bitter taste, or no taste in her mouth/ her mouth still has that nasty, old bitter taste that does not go away with brushed teeth; has a really bitter taste, or no taste in her mouth/ her mouth still has that nasty, old bitter taste that does not go away with brushed teeth; This is a spontaneous report from a contactable consumer (patient) via a Pfizer-sponsored program Pfizer First Connect. An 81-year-old female patient received her first dose of bnt162b2 (BNT162B2 reported as PFIZER COVID-19 VACCINE; manufacturer reported as Pfizer-Wyeth; lot number: EL1283; expiration date: unknown), via an unspecified route of administration left arm on 21Jan2021 12:30 at 0.3 mL, single dose for covid-19 immunization. Medical history included arthritis in back; always had diarrhea because she had cancer and is unable to control her bowels. They tell her she has a lot of fiber in her food; but she can't control it; if she eats vegetables then she knows what's happening; but she always tries to take Imodium A-D before eating vegetables. She mentioned to them if she did not eat vegetables all she could eat is meat and cheese; doctor told her she was borderline diabetic, so she has wanted to keep up with that. The doctor was not worried about it; ongoing acid reflux; pain; and ongoing high blood pressure. Concomitant medication included ongoing omeprazole for acid reflux, ongoing amlodipine for high blood pressure, naproxen for arthritis in back, caffeine, codeine phosphate, paracetamol (ACETAMINOPHEN WITH CODEINE) for pain, loperamide hydrochloride (IMODIUM A-D) for diarrhea. The patient has not received any other vaccinations within four weeks prior to the first administration of the covid-19 vaccine. Vaccinations reported as she has gotten flu shots and pneumonia shot and has never had any adverse events, reactions or problems with those; nothing. The reporter mentioned that she got her first dose of the vaccine in a clinic on 21Jan2021 and aware that the second dose will be on 16Feb2021. The patient reported that she felt bad after taking the first dose-flu like symptoms on 23Jan2021 at 8:00 and had high fever Saturday (23Jan2021), urine became yellowish-brown and wants to know more information. The patient guesses she is having an allergic reaction on 23Jan2021 at 8:00 and asked for further information about the allergic reaction relative to the vaccine. On Saturday (23Jan2021), she was feeling good. She got up, went to store, came back and had little diarrhea symptoms then she began to get sick, feverish. She added that then the vomiting, then achy like flu symptoms. She still feels feverish, she has a really bitter taste, or no taste in her mouth really but it's going away. To her it seems like the worst part is over. She almost called 911 but then did not want to go the hospital because of all the people with COVID in the hospital. The next day on 24Jan2021, when she woke up, she was not as fevered. She can check her own self with her hand and it was like she put her hand on a stove. She went to sleep and the next morning (24Jan2021), she was not as feverish; her mouth still has that nasty, old bitter taste that does not go away with brushed teeth. She feels better today (unspecified date). She mentioned that the second dose is scheduled to be administered 16Feb2021, but she really does not want to go get that if she feels like this. She had blood work for her sugar done on 21Jan2021 because she is borderline diabetic, but results are unknown, have not had any results yet. The outcome of the events was recovering.