Fainting spells after first booster; Dizziness after first booster; Blood Pressure dropped  Off & on after first booster/Blood pressure dropped to 70 a few months after first booster/Does not have high blood pressure after the first booster; Pale as a ghost after first booster; This spontaneous case was reported by a patient and describes the occurrence of SYNCOPE (Fainting spells after first booster), DIZZINESS (Dizziness after first booster), BLOOD PRESSURE FLUCTUATION (Blood Pressure dropped  Off & on after first booster/Blood pressure dropped to 70 a few months after first booster/Does not have high blood pressure after the first booster) and PALLOR (Pale as a ghost after first booster) in a 72-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 017F21A) for COVID-19 prophylaxis.     Concurrent medical conditions included Hypertension.    On 23-Oct-2021, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) .25 milliliter. On 23-Oct-2021, the patient experienced SYNCOPE (Fainting spells after first booster) (seriousness criteria hospitalization and medically significant), DIZZINESS (Dizziness after first booster) (seriousness criterion hospitalization), BLOOD PRESSURE FLUCTUATION (Blood Pressure dropped  Off & on after first booster/Blood pressure dropped to 70 a few months after first booster/Does not have high blood pressure after the first booster) (seriousness criterion hospitalization) and PALLOR (Pale as a ghost after first booster) (seriousness criterion hospitalization). The patient was hospitalized on sometime in May 2022 due to BLOOD PRESSURE FLUCTUATION, DIZZINESS, PALLOR and SYNCOPE. In May 2022, SYNCOPE (Fainting spells after first booster), DIZZINESS (Dizziness after first booster), BLOOD PRESSURE FLUCTUATION (Blood Pressure dropped  Off & on after first booster/Blood pressure dropped to 70 a few months after first booster/Does not have high blood pressure after the first booster) and PALLOR (Pale as a ghost after first booster) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In May 2022, Blood pressure measurement: blood pressure dropped to 70. On 20-Jul-2022, Blood pressure measurement: 117/80 mmHg.         Patient took first dose of Moderna vaccine on 11-Mar-2021, with Batch no. 040A21A. Patient received a half dose first booster of Moderna COVID-19 vaccine on 23-Oct-2021. Patient got admitted to hospital in May-2022 and the doctor took her off Blood Pressure medications. On 20-Jul-2022, without Blood Pressure medications she had maintained normal Blood Pressure. She doesn't had high blood pressure any more after the first booster.  Company comment: This spontaneous case reported by a consumer concerns a 72-year-old female patient, with relevant current condition of hypertension, who experienced the serious (caused hospitalization) unexpected events of Syncope (also medically significant), Dizziness, Pallor, and Blood pressure fluctuation occurred on same day after first booster dose of mRNA-1273 vaccine. The events resolved in approximately 6 months. It was reported that patient maintained normal blood pressure without medications after the first booster. Current condition of hypertension remains a confounding factor for the events syncope and dizziness. As The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.   This case was linked to MOD-2021-328260 (Patient Link).; Sender's Comments: This spontaneous case reported by a consumer concerns a 72-year-old female patient, with relevant current condition of hypertension, who experienced the serious (caused hospitalization) unexpected events of Syncope (also medically significant), Dizziness, Pallor, and Blood pressure fluctuation occurred on same day after first booster dose of mRNA-1273 vaccine. The events resolved in approximately 6 months. It was reported that patient maintained normal blood pressure without medications after the first booster. Current condition of hypertension remains a confounding factor for the events syncope and dizziness. As The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.