on the verge of passing out; felt flushing; chest pain; dry heaving; high blood pressure, around 177/100; pericarditis has gotten worse (inflammation around the sac); This spontaneous case was reported by a consumer and describes the occurrence of LOSS OF CONSCIOUSNESS (on the verge of passing out), FLUSHING (felt flushing), CHEST PAIN (chest pain), RETCHING (dry heaving), HYPERTENSION (high blood pressure, around 177/100) and PERICARDITIS (pericarditis has gotten worse (inflammation around the sac)) in a 52-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 027C21A) for COVID-19 vaccination.     No Medical History information was reported.    On 07-May-2021, the patient received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 07-May-2021, the patient experienced LOSS OF CONSCIOUSNESS (on the verge of passing out) (seriousness criteria hospitalization and medically significant), FLUSHING (felt flushing) (seriousness criterion hospitalization), CHEST PAIN (chest pain) (seriousness criterion hospitalization), RETCHING (dry heaving) (seriousness criterion hospitalization), HYPERTENSION (high blood pressure, around 177/100) (seriousness criterion hospitalization) and PERICARDITIS (pericarditis has gotten worse (inflammation around the sac)) (seriousness criteria hospitalization and medically significant). At the time of the report, LOSS OF CONSCIOUSNESS (on the verge of passing out), FLUSHING (felt flushing), CHEST PAIN (chest pain), RETCHING (dry heaving), HYPERTENSION (high blood pressure, around 177/100) and PERICARDITIS (pericarditis has gotten worse (inflammation around the sac)) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 07-May-2021, Blood pressure measurement: 177/100 (High) high. On an unknown date, Blood pressure measurement: 122/73 (normal) Usual blood pressure.         No concomitant medications were reported Treatment included medicine for nausea name was unspecified Company comment:  This is a spontaneous case concerning a 52-year-old, female patient with no medical history reported, who experienced the unexpected serious events of loss of consciousness, flushing, chest pain, retching, hypertension, and the serious expected event of special interest of pericarditis. The events loss of consciousness, flushing, chest pain, retching, hypertension occurred within 5-10 minutes after the second dose of mRNA-1273 vaccine. It is unclear if the event pericarditis started before the second dose. The benefit-risk relationship of mRNA-1273 Vaccine is not affected by this report.   This case was linked to MOD-2021-409849 (Patient Link).; Sender's Comments: This is a spontaneous case concerning a 52-year-old, female patient with no medical history reported, who experienced the unexpected serious events of loss of consciousness, flushing, chest pain, retching, hypertension, and the serious expected event of special interest of pericarditis. The events loss of consciousness, flushing, chest pain, retching, hypertension occurred within 5-10 minutes after the second dose of mRNA-1273 vaccine. It is unclear if the event pericarditis started before the second dose. The benefit-risk relationship of mRNA-1273 Vaccine is not affected by this report.