like she has been wanting to throw up/nausea, whenever she felt like throwing up; may be a stomach flu; weakness; has been feeling unwell; loss of appetite; she has been feeling shaky/nervousness; This is a spontaneous report from a contactable consumer (patient). A female patient of an unspecified age received second dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE; lot ER8733; expiration date: 31Jul2021), via an unspecified route of administration, administered in left arm on 25Mar2021 04:00 as single dose for covid-19 immunisation. Medical history included high blood pressure, and allergies to dust, grass, and loud smells like perfume, a lot of smells. The patient's concomitant medications were not reported. The patient received first dose of bnt162b2 on 04Mar2021 for covid-19 immunisation. She had her second dose on 25Mar2021 and had no symptoms until 20Apr2021. On 20Apr2021, she first went to urgent care because of her no appetite and they didn't do anything so then she went to the emergency room on 21Apr2021 because she tried to throw up. They gave her fluids but did not know the name of it, just that it took about 1 to 1 and a half hours. They took her blood and took her urine and did a chest x-ray. She did not have blood taken at the hospital emergency room but did have her urine taken and a chest x-ray and they didn't find nothing wrong with her. They stated it may be a stomach flu and she went home. She reported she had side effects and didn't know if it was supposed to happen. On 20Apr2021, she also had nervousness, and had no appetite, and was feeling shaky, weakness and has been feeling unwell. She has never had nothing like this and overall she has been in good condition. She stated that the side effects do not happen everyday and she tried to drink a lot of fluids and electrolytes, water and Gatorade and lays down in bed. She tried a little oatmeal but didn't have a taste for it so she ate a little soup, a noodle soup. She reported that she did not have an appetite this morning (as reported) but she did eat some soup and a lot of crackers. She was feeling good until this sickness. Her daughter stated she shouldn't have gotten the shots. She stated that maybe something was wrong, and she never had this before. Her primary prescribed Famotidine, one tablet a day 20mg, by mouth. She stated she just started taking the other day. It's for 14 days. She has 10 left, so she's been taking for 4 days. She was also prescribed Ondansetron at the hospital for nausea, whenever she felt like throwing up. She stated she does not like it and stated you put it on top of your tongue and don't drink water or eat with it. It was 1 tablet every 8 hours as needed. She reported that she was about 4'10" in height and she had shrunk because she used to be 5' height. She followed up with her healthcare provider on 04Apr2021 (as reported), who prescribed her something for acid reflux and she stated acid reflux wasn't it. The events loss of appetite and throwing up required a visit to emergency room. The patient had no previous immunization with Pfizer vaccines and no additional vaccines administered on the same date of the vaccine. There were no prior vaccinations within 4 weeks. Outcome of event may be a stomach flu was unknown; outcome of the rest of events was unknown.   No follow-up attempts are needed. No further information is expected.