burning in my stomach; may be allergic to the shot; vomit; sweating profusely; hyperventilate; tongue was slightly swollen; blood in my diarrhea; faint; dizzy; weak; sick to my stomach; chemical or metal taste in my mouth; cloudiness in my eyes; diarrhea; too scared to eat; This spontaneous case was reported by a consumer and describes the occurrence of DIARRHOEA HAEMORRHAGIC (blood in my diarrhea) and SYNCOPE (faint) in a 72-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.    On 15-Sep-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 15-Sep-2021, the patient experienced DIZZINESS (dizzy), ASTHENIA (weak), ABDOMINAL DISCOMFORT (sick to my stomach), DYSGEUSIA (chemical or metal taste in my mouth), OCULAR DISCOMFORT (cloudiness in my eyes), DIARRHOEA (diarrhea) and FEEDING DISORDER (too scared to eat). On 18-Sep-2021, the patient experienced DIARRHOEA HAEMORRHAGIC (blood in my diarrhea) (seriousness criterion medically significant), SYNCOPE (faint) (seriousness criterion medically significant), HYPERHIDROSIS (sweating profusely), HYPERVENTILATION (hyperventilate), SWOLLEN TONGUE (tongue was slightly swollen), ALLERGY TO VACCINE (may be allergic to the shot) and VOMITING (vomit). On 19-Sep-2021, the patient experienced DYSPEPSIA (burning in my stomach). At the time of the report, DIARRHOEA HAEMORRHAGIC (blood in my diarrhea), SYNCOPE (faint), DIZZINESS (dizzy), ASTHENIA (weak), ABDOMINAL DISCOMFORT (sick to my stomach), DYSGEUSIA (chemical or metal taste in my mouth), OCULAR DISCOMFORT (cloudiness in my eyes), DIARRHOEA (diarrhea), FEEDING DISORDER (too scared to eat), HYPERHIDROSIS (sweating profusely), HYPERVENTILATION (hyperventilate), SWOLLEN TONGUE (tongue was slightly swollen), DYSPEPSIA (burning in my stomach), ALLERGY TO VACCINE (may be allergic to the shot) and VOMITING (vomit) had not resolved.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       No concomitant medication information was provided No treatment product information was provided  company comment: This case concerns a 72-year-old, female patient with no relevant medical history, who experienced the unexpected event of diarrhea hemorrhagic. The event occurred approximately 4 days after the first dose of Moderna Covid-19 vaccine. The rechallenge was not applicable, as the event happened after the first dose. The event was considered related to the product per the reporter's assessment. The benefit-risk relationship of Moderna Covid-19 vaccine  is not affected by this report.; Sender's Comments: This case concerns a 72-year-old, female patient with no relevant medical history, who experienced the unexpected event of diarrhea hemorrhagic. The event occurred approximately 4 days after the first dose of Moderna Covid-19 vaccine. The rechallenge was not applicable, as the event happened after the first dose. The event was considered related to the product per the reporter's assessment. The benefit-risk relationship of Moderna Covid-19 vaccine  is not affected by this report.