vertigo; rapid heart rate; blurry vision in her left eye; anxiety; spiked blood pressure; very scared; Could not eat; massive, pounding, throbbing, pulsating headache/pain in her left side of the brain; panic attack; Electrical surges all over the body; slight tremors/Hands shaking; insomnia/cannot sleep; Migraine; Sleep disorder; Pain in the left side of the body; seems off in her brain; blood  clot in her vein; This spontaneous case was reported by a consumer and describes the occurrence of HEADACHE (massive, pounding, throbbing, pulsating headache/pain in her left side of the brain), VERTIGO (vertigo), HEART RATE INCREASED (rapid heart rate), VISION BLURRED (blurry vision in her left eye), ANXIETY (anxiety), BLOOD PRESSURE INCREASED (spiked blood pressure), FEAR (very scared), FEEDING DISORDER (Could not eat), CEREBRAL DISORDER (seems off in her brain) and VENOUS THROMBOSIS (blood  clot in her vein) in a 35-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 039A21A and 045B21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     The patient's past medical history included Cystitis interstitial.   On 04-Apr-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 02-May-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 11-Apr-2021, the patient experienced HEADACHE (massive, pounding, throbbing, pulsating headache/pain in her left side of the brain) (seriousness criterion hospitalization). On 11-Jun-2021, the patient experienced VENOUS THROMBOSIS (blood  clot in her vein) (seriousness criterion medically significant). On an unknown date,  after starting mRNA-1273 (Moderna COVID-19 Vaccine), the patient experienced VERTIGO (vertigo) (seriousness criterion hospitalization), HEART RATE INCREASED (rapid heart rate) (seriousness criterion hospitalization), VISION BLURRED (blurry vision in her left eye) (seriousness criterion hospitalization), ANXIETY (anxiety) (seriousness criterion hospitalization), BLOOD PRESSURE INCREASED (spiked blood pressure) (seriousness criterion hospitalization), FEAR (very scared) (seriousness criterion hospitalization), FEEDING DISORDER (Could not eat) (seriousness criterion hospitalization), CEREBRAL DISORDER (seems off in her brain) (seriousness criterion medically significant), PANIC ATTACK (panic attack), ELECTRIC SHOCK SENSATION (Electrical surges all over the body), TREMOR (slight tremors/Hands shaking), INSOMNIA (insomnia/cannot sleep), MIGRAINE (Migraine), SLEEP DISORDER (Sleep disorder) and PAIN (Pain in the left side of the body). The patient was treated with PARACETAMOL (TYLENOL) for Panic attack, at an unspecified dose and frequency and HYDROXYZINE for Panic attack, at an unspecified dose and frequency. At the time of the report, HEADACHE (massive, pounding, throbbing, pulsating headache/pain in her left side of the brain), VERTIGO (vertigo), HEART RATE INCREASED (rapid heart rate), VISION BLURRED (blurry vision in her left eye), ANXIETY (anxiety), BLOOD PRESSURE INCREASED (spiked blood pressure), FEAR (very scared), FEEDING DISORDER (Could not eat), CEREBRAL DISORDER (seems off in her brain), VENOUS THROMBOSIS (blood  clot in her vein), PANIC ATTACK (panic attack), ELECTRIC SHOCK SENSATION (Electrical surges all over the body), TREMOR (slight tremors/Hands shaking), INSOMNIA (insomnia/cannot sleep), MIGRAINE (Migraine), SLEEP DISORDER (Sleep disorder) and PAIN (Pain in the left side of the body) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 08-Jun-2021, Magnetic resonance imaging: abnormal (abnormal) result found a 5 mm shadow in her left side of the brain right above her eye, but doctor said it might be a migraine that causes her symptoms. On 11-Jul-2021, Angiogram: abnormal (abnormal) found a blood  clot in her vein. On an unknown date, Blood test: normal (normal) normal. On an unknown date, Computerised tomogram: normal (normal) normal.         Concomitant product use was not provided by the reporter. Patient had her Lyme disease test and test for meningitis and cephalates, but everything came negative.  Patient has developed all symptoms after her first dose of Moderna COVID-19 Vaccine.  Company Comment : This case concerns a 35-year-old female patient with no relevant medical history who experienced serious unexpected events Headache, Vertigo, Heart rate increased, Blurred vision, Anxiety, Blood pressure increased, Fear, Eating disorder, Cerebral disorder and Venous thrombosis. The events occurred after the first dose of Moderna, whereas the event of venous thrombosis occurred approximately a month after the second dose of Moderna.   Most recent FOLLOW-UP information incorporated above includes: On 13-Sep-2021: Significant follow up received - Patient demographics, medical history, lab data, product details updated, treatment medications, new events added and narrative updated. Case upgraded to serious.; Sender's Comments: This case concerns a 35-year-old female patient with no relevant medical history who experienced serious unexpected events Headache, Vertigo, Heart rate increased, Blurred vision, Anxiety, Blood pressure increased, Fear, Eating disorder, Cerebral disorder and Venous thrombosis. The events occurred after the first dose of Moderna, whereas the event of venous thrombosis occurred approximately a month after the second dose of Moderna.