sleepy and slept for 16 hours; feverish; vomiting; real dizzy; heart was racing fast; things started with her stomach; she was so weak and could not do anything herself.; face was red; diarrhea; severe upper stomach pain; Severe dehydration; This spontaneous case was reported by a patient and describes the occurrence of DIZZINESS (real dizzy), PALPITATIONS (heart was racing fast), ABDOMINAL DISCOMFORT (things started with her stomach), ASTHENIA (she was so weak and could not do anything herself.), ERYTHEMA (face was red), DIARRHOEA (diarrhea), ABDOMINAL PAIN UPPER (severe upper stomach pain), DEHYDRATION (Severe dehydration), SOMNOLENCE (sleepy and slept for 16 hours), VOMITING (vomiting) and PYREXIA (feverish) in a 56-year-old patient of an unknown gender who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 042B21A and 017C21A) for COVID-19 vaccination.     No Medical History information was reported.   On 30-Apr-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 28-May-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 30-Apr-2021, the patient experienced SOMNOLENCE (sleepy and slept for 16 hours) (seriousness criterion hospitalization). On 28-May-2021, the patient experienced DIZZINESS (real dizzy) (seriousness criterion hospitalization), PALPITATIONS (heart was racing fast) (seriousness criterion hospitalization), ABDOMINAL DISCOMFORT (things started with her stomach) (seriousness criterion hospitalization), ASTHENIA (she was so weak and could not do anything herself.) (seriousness criterion hospitalization), ERYTHEMA (face was red) (seriousness criterion hospitalization), DIARRHOEA (diarrhea) (seriousness criterion hospitalization), ABDOMINAL PAIN UPPER (severe upper stomach pain) (seriousness criterion hospitalization), DEHYDRATION (Severe dehydration) (seriousness criterion hospitalization) and VOMITING (vomiting) (seriousness criterion hospitalization). On 21-Jun-2021, the patient experienced PYREXIA (feverish) (seriousness criterion hospitalization). The patient was hospitalized from 12-Jun-2021 to 19-Jun-2021 due to ABDOMINAL DISCOMFORT, ABDOMINAL PAIN UPPER, ASTHENIA, DEHYDRATION, DIARRHOEA, DIZZINESS, ERYTHEMA, PALPITATIONS, PYREXIA and VOMITING. At the time of the report, DIZZINESS (real dizzy), PALPITATIONS (heart was racing fast), ABDOMINAL DISCOMFORT (things started with her stomach), ASTHENIA (she was so weak and could not do anything herself.), ERYTHEMA (face was red), DIARRHOEA (diarrhea), ABDOMINAL PAIN UPPER (severe upper stomach pain), DEHYDRATION (Severe dehydration), SOMNOLENCE (sleepy and slept for 16 hours), VOMITING (vomiting) and PYREXIA (feverish) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 12-Jun-2021, Blood pressure measurement: 205/148 High.         patient had also stated that She has been worse all these days. on 28-may-2021 she had mentioned that her body was terrible.12-jun-2021 patient stated that she had feels like having to go to the bathroom again on 21-JUN-2021 she had also stated that after getting out of the hospital she is currently feeling worse. no treatment medication was given  no concomitant medication was given.  Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.   This case was linked to MOD-2021-230096 (Patient Link).; Sender's Comments: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.