diarrhea; I started getting sick; I sick my stomach; Nauseated; Throwing up; Chills; I had such a headache that I could not hardly even see straight/I was very close to going into the emergency room because my head was pounding so bad; Fatigue; Muscle pain; This is a spontaneous report from a contactable consumer or other non hcp. A 68-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Formulation: Solution for injection, Batch/Lot Number: EN6202; Expiry Date: Unknown), dose 1 via an unspecified route of administration on 26Feb2021 (at the age of 68-years-old) as dose 1, single for covid-19 immunisation. Medical history was none. There were no concomitant medications.  On 26Feb2021, the patient experienced "i started getting sick", "i sick my stomach", nauseated, throwing up, chills, "i had such a headache that i could not hardly even see straight/i was very close to going into the emergency room because my head was pounding so bad", fatigue, muscle pain and diarrhea on 01Mar2021. Therapeutic measures were taken as a result of throwing up. She reported that the events came up about an hour and a half this last Friday whichever that was. The patient mentioned that she received her 1st dose of the vaccine last Friday afternoon. About an hour trip home later, she got an upset stomach which got a whole lot worse. She started throwing up which continued for about 4 hours. She took 1 Dopram pill to stop it and it did but she so sick and could not throw up until 3am. She also had an extreme headache with her head pounding on the pillow and had chills. She felt just awful. She mentioned that the worse part was the headache and the vomiting. The next day, her stomach was still upset but it was not as bad and she was able to have some soup. She also mentioned that she had diarrhea by the 3rd day. She is worried and asking what the 2nd dose might do to her and will it be the same. She mentioned that she consulted with her doctor and they did not know what to recommend her. The patient asked if she have to get the second dose. She did not want to get COVID but want to go through the vaccination again because it was really a problem. She asked if there was any protection after the 1st dose. Her doctor said it was about 50% and she asked if it was  this correct. Her 2nd dose was due in 2 weeks tomorrow. She asked if she can get it later should she decide to. She wanted to if she can take other brand vaccine for her second dose. When asked about treatment she responded "I could not. I was throwing up. I could not put anything down there that would come right out back, up." When asked about Prescribing Healthcare Professional details, she said she had called her doctor. She said she was close to going into the emergency room because her head was pounding so bad and she was so sick to her stomach. She just wanted to get some relief. She was concerned to, if her reaction was going to be worst with the second vaccine. Outcome of the events were unknown.   Follow-up (04Mar2021): This is a Follow-up spontaneous report from a contactable consumer. This 68-year-old female consumer reported included unit of patient age, weight, height and clinical information.   No follow-up attempts are possible. No further information is expected.