Nausea; her thinking was not clear and her head felt cloudy/not sharply thinking; clumsy; My memory is not what is usually is; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient. Other Case identifier(s): US-PFIZER INC-2021382922 (Pfizer).  A female patient received bnt162b2 (BNT162B2), administration date 26Mar2021 (Batch/Lot number: unknown) as dose 1, single for covid-19 immunisation. Relevant medical history included: "Meningioma benign", start date: 2010 (unspecified if ongoing), notes: Verbatim: Benign meningioma. The patient's concomitant medications were not reported. The following information was reported: NAUSEA (non-serious) with onset 26Mar2021, outcome "recovered", described as "Nausea"; BRADYPHRENIA (non-serious) with onset 26Mar2021, outcome "recovered", described as "her thinking was not clear and her head felt cloudy/not sharply thinking"; CLUMSINESS (non-serious) with onset 26Mar2021, outcome "recovered", described as "clumsy"; MEMORY IMPAIRMENT (non-serious) with onset 26Mar2021, outcome "recovered", described as "My memory is not what is usually is". Relevant laboratory tests and procedures are available in the appropriate section.  Additional information: States as a background, in 2010 she had benign meningiomas and had surgery, thankfully they were benign and they took most of the growth out in surgery and left a little bit of the benign reminder. States she was followed up since then with a MRI every year and everything has been excellent. States there was also a little cyst, a little part that was left. States the day she had the vaccine she had nausea, but she was not that concerned with that and took ginger and easily dealt with it. States what she was concerned about, was what she had for about 7 days. States it was hard to explain the symptoms related to her head and brain, it was hard to describe. Caller states before she had the vaccine, she was in excellent health and had very clear thinking, clarity, etc. She states after the vaccine for 7 days she experienced a lack of clarity; her thinking was not clear, and her head felt cloudy, she was not sharply thinking. States she was not even remembering things unlike her usual excellent memory. States it almost felt like it affected her motor ability as well. States in other words, she felt clumsier, like when she was picking something up. States it was just very different and difficult to describe. States finally on 7th day it got much better, and the 8th day was much better. States it was from 26Mar2021-1Apr2021 or 2Apr2021. States, she was very relieved to be feeling much better and more to herself. States she was happy that things have been working out for her. States she leads a very healthy life, and she was not any different than she used to be. States she does no smoking, no drugs, no alcohol, eats healthy foods, exercises, etc. States she did get her first shot because her family asked her to and she did it and to be helpful overall to everything. States her question was this, she was very bad, and she wouldn't want to feel that way again. States and that was with the first shot, and she understands the second shot was the one people have more reaction to. States because of her reaction and background and the reaction that last a week with first one, what was advised? Does she feel that she must get the second shot or does she have enough with first shot to proceed without the second one. States she doesn't want to take a chance that perhaps part of her brain could have been affected temporarily because of vaccine. States nothing else has happened over the years. Patient received her first dose of the Pfizer COVID-19 vaccine on 26Mar2021 and was requesting information about whether or not she should receive the second dose after the type of reaction that she had. She states, "After she had the vaccine there was nausea which was nothing, she took ginger and that was taken care of, but later on that day until April 1st or 2nd I had 7 days of another different side effect which was more in her head and brain area with functioning. It was a feeling of a cloud feeling and her thinking was not very clear. Usually, her thinking was very clear. Her memory was not what was usually was. Also, even her motor skills, she seemed clumsier when she went to do something with her arms or hands, it was not good for those days, and finally on April 1st or 2nd she started to return more to her normal self. In 2010 she had benign meningioma surgery and she have been fine. They took out most of it and left a tiny bit of the benign part. She has been fine; she had an MRI every year and doctor checkups every year. She lives a healthy life, she doesn't smoke drink no drugs, she exercises. Her concern was that it was a terrible feeling for those 7 days, and she was not sure about whether she should have the second dose or whether she was protected enough with the first shot. Usually, they say that the second shot are inclined to have more side effects than the first dose" patient states that she did speak with her HCP, and he told her to call Pfizer to report this reaction and ask for further guidance. Patient confirms that she filed an Adverse Event report.   No follow-up attempts are possible. No further information is expected.