Sick; Frustrated; nausea; fatigue; lots of sleeping; I could not get out of bed, it was 30 hours before I was able to drink or eat anything. I spent 2 and a half days in bed, lost 3 days of work/bedridden; felt slightly dizzy; 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-2021334680 (Pfizer).  A 67-year-old female patient received bnt162b2 (BNT162B2), administration date 13Mar2021 09:30 (Lot number: EN6205) at the age of 67 years as dose 1, single for COVID-19 immunization. Relevant medical history included: "Blood sugar" (unspecified if ongoing). Concomitant medication(s) included: METFORMIN taken for blood glucose abnormal. Vaccination history included: Flu vaccine (I have had two other vaccinations to share both the flu and pneumonia (Unspecified Vaccines) and I was just absolutely fine. No problems at all. I took it several months earlier, many months earlier. Not anywhere taking the Pfizer COVID vaccine."); Pneumonia vaccine (I have had two other vaccinations to share both the flu and pneumonia (Unspecified Vaccines) and I was just absolutely fine. No problems at all. I took it several months earlier, many months earlier. Not anywhere taking the Pfizer COVID vaccine."). The following information was reported: DIZZINESS (non-serious) with onset 14Mar2021 17:00, outcome "unknown", described as "felt slightly dizzy"; BEDRIDDEN (non-serious) with onset 15Mar2021, outcome "unknown", described as "I could not get out of bed, it was 30 hours before I was able to drink or eat anything. I spent 2 and a half days in bed, lost 3 days of work/bedridden"; ILLNESS (non-serious), outcome "unknown", described as "Sick"; FRUSTRATION TOLERANCE DECREASED (non-serious), outcome "unknown", described as "Frustrated"; NAUSEA (non-serious), outcome "unknown", described as "nausea"; FATIGUE (non-serious), outcome "unknown", described as "fatigue"; SOMNOLENCE (non-serious), outcome "unknown", described as "lots of sleeping". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as result of dizziness.  Additional information: Patient was not obese. She was thin, healthy woman, with no risk factors. Consumer stated, her concern was she had first Pfizer Vaccination and had an extremely adverse reaction not an allergic reaction so she wanted to report it, but more importantly, she needed to know what to do? What were her options. Patient had first dose of Pfizer COVID vaccine on Saturday, 13Mar2021. On Sunday night, she felt a bit dizzy. She stated she continued to feel worse being afebrile, a lot of dizziness for which she took a dose of meclizine, nausea, fatigue, and lots of sleeping. She was in bed for 2 days, missed 3 days of work, didn't eat or drink for 30 hours. She says she was profoundly ill and that this is an unusual reaction for her. She was leery about getting the second dose, scheduled for 03Ap2021, because she does not know what to anticipate. She was looking for recommendations. Caller tried previously to report side effects however she states the representative did not collect her side effect symptoms. Start date of adverse event: Consumer stated, she got the vaccine in the morning at about 9:30 in the morning, Saturday morning, Sunday night at 5 pm. she felt slightly dizzy. When she woke up Monday morning, she could not get out of bed, it was 30 hours before she was able to drink or eat anything. She spent 2 and a half days in bed, lost 3 days of work. Treatment: Consumer stated, she finally took a little bit of an anti-dizzy medication. But she was not on that anymore. She just took the two doses and the medication it was Meclizine. She took a Quarter of the recommended dose twice to help with the dizziness and that was it. She was almost back to normal. It was Wednesday night. she took a quarter of a tablet." Patient took Metformin to control blood sugar. She was not diabetic. Her blood pressure and A1C was wonderful. But the Metformin was just helping it. She have not been diagnosed with prediabetes or diabetes. It was just to keep her blood sugar just a little bit lower.  No follow-up attempts are possible. No further information is expected.