Pfizer Coronavirus Vaccination first dose administered on 02Apr2021, second dose administered on 20Apr2021; Headaches; when she stood up she felt like a little dizzy or whatever; just didn't feel really well, just something was off/ does not feel like herself; Does not feel like herself; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 64 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 20Apr2021 (Batch/Lot number: unknown) at the age of 64 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "High blood pressure" (ongoing), notes: Illness/AE: High blood pressure, Onset Date: Unknown, Stop Date: Ongoing; "cholesterol" (unspecified if ongoing); "obese" (unspecified if ongoing); "overweight" (unspecified if ongoing). The patient took concomitant medications. Vaccination history included: Bnt162b2 (Route: Injection, Anatomical Location: Left arm, No. of Previous Doses: This was dose 1 of 2., Date: 02Apr2021), administration date: 02Apr2021, when the patient was 64 years old, for COVID-19 Immunization. The following information was reported: INAPPROPRIATE SCHEDULE OF PRODUCT ADMINISTRATION (non-serious), outcome "unknown", described as "Pfizer Coronavirus Vaccination first dose administered on 02Apr2021, second dose administered on 20Apr2021"; DIZZINESS (non-serious) with onset 20Apr2021, outcome "unknown", described as "when she stood up she felt like a little dizzy or whatever"; MALAISE (non-serious) with onset 20Apr2021, outcome "unknown", described as "just didn't feel really well, just something was off/ does not feel like herself"; FEELING ABNORMAL (non-serious) with onset 20Apr2021, outcome "unknown", described as "Does not feel like herself"; HEADACHE (non-serious), outcome "unknown", described as "Headaches". The events "when she stood up she felt like a little dizzy or whatever", "just didn't feel really well, just something was off/ does not feel like herself" and "does not feel like herself" were evaluated at the emergency room visit. Therapeutic measures were taken as a result of inappropriate schedule of product administration, dizziness, malaise, feeling abnormal, headache.  Additional information: This consumer called regarding Pfizer Coronavirus Vaccination. She went to get her second shot of the Pfizer Coronavirus Vaccination and it seemed like after second shot; you can sit down and regroup for a few minutes or whatever. She just didn't feel really well, just something was off; felt like when she stood up she felt like a little dizzy or whatever. The monitors on site were asking her if she was ok, she was like she was, but felt a little dizzy and wanted to sit down for a little bit more. She does not know if they have like the fire department medics on site or whatever, but they asked her if she was ok, do you think you need to go to the hospital or doctor and she said she might be ok; but then she was still feeling and they were like are you sure, so she went to emergency room via ambulance. She did not get any paperwork from the emergency room, she doesn't know if they sent it to the vaccine site. By the time she left the emergency room it was nightfall and by then the vaccine site was closed. While in the emergency room she was given IV fluids via IV drip but she doesn't know what was in the IV, if it was saline or something else or why they gave her the IV, if it was to flush it out of the system or what. She clarified she was not admitted to the hospital, she was kept under observation in the emergency room only. She does not feel like herself since date of second dose of Pfizer Coronavirus Vaccination. She has had headaches, does not know where the headaches have come from, just that they began shortly after second dose of Pfizer Coronavirus Vaccination-onset date/time unknown. She was just trying to make sure she is going to be ok, asked if these events are side effects of the Pfizer Coronavirus Vaccination, and what are side effects of the Pfizer Coronavirus Vaccination. She takes medications for high blood pressure, cholesterol, and unknown if it is a blood thinner, but it is a heart medication, but was unable to provide further details for this report. She mentioned when telephone number offered that she is a senior citizen so her memory gets shaky so she writes everything down. Only thing respiratory she used to have a CPAP machine a long time ago, years ago and lost weight, don't need CPAP machine anymore, but she used to be overweight, really overweight. They might still call her obese, she doesn't know. She never even had a flu shot only vaccines she had when she was a little girl where they give you vaccines in the arm.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.