achy and stuff; exhausted; was unwell; horrible headache worse than any migraine she had; horrible vomiting, vomited for 6 hours until it was bile coming out; This is a spontaneous report from a contactable consumer (patient's mother). A 34-year-old female patient (reporter's daughter) received the first dose of BNT162B2 (Pfizer- Biontech COVID-19 Vaccine) via an unspecified route of administration on 03Apr2021 at age of 34 years at single dose for COVID-19 immunization. Medical history included migraine and that she had a very mild case of Covid in Jan2021, tested positive and she had a stuffy nose was the only symptom. Concomitant medications included 2 allergy medications, took allergy pills in the morning and at night, she took 2 different ones. She thought one was loratadine (CLARITIN) in the morning and if it was a bad season her doctor had her take something else over the counter. No additional vaccines administered on same date of the Pfizer suspect. No prior vaccinations within 4 weeks. Patient got it the week before and woke up at her house her 2nd day (04Apr2021) was a horrible headache worse than any migraine she had and she had a very mild case of Covid in Jan2021, tested positive and she had a stuffy nose was the only symptom or she wouldn't have known, she thought it was allergies. Stated someone her daughter knew got Covid and so she tested and stayed quarantined and thought the horrible symptoms were because she had had Covid. She could not get out of bed from the headache and the horrible vomiting started and continued for about 6 hours, consumer stated she was really frightened. Stated her daughter didn't want to report. Stated she was getting her 2nd dose 24May2021 and was flying and that she couldn't stop throwing up even water. Consumer clarified that her daughter woke up around 8am and was feeling great and visiting friends and read online it was ok to have a drink after getting the shot, that it had no effect on it. Stated she might have had 4 drinks over 5-6 hours with her friends with a lot of water. Stated she threw up once with hangovers. Stated she vomited for 6 hours until it was bile coming out and she was laying in bed and theconsumer brought her things in and she had to catch a plane. Stated it wasn't life threatening but she was watching her in case it was. Stated the 2nd day (04Apr2021) her daughter had a horrible headache and was vomiting and had almond milk and bought milk at the airport and got through the trip and threw up 1 time after the plane. Stated she was exhausted the next day and the 3rd day on Monday (05Apr2021) she had fatigue and was unwell days 3 (05Apr2021), 4, and 5. Stated she was achy and stuff and she still worked and functioned and after that she seemed to be fine. Stated her daughter told her she thought this was bad after the 2nd dose and she wondered if it was because she had Covid and her body knew what it was. Consumer stated few people come forward with information maybe about alcohol instead the affect may affect symptoms may have seen as minor are major but she did it because it said it was ok and she felt she checked the form and it said no problem. Stated if she did drink, every drink she had she drunk 1-2 glasses of water to flush her system and that was how she did it so she didn't get sick. Not to say she hadn't done that before. Stated she usually would throw up once and would have a cracker and drink milk and it stopped and she couldn't stop this one. Outcome of event was unknown.   No follow-up attempts are needed; information about lot/batch number cannot be obtained.