extreme pain in her chest and abdomen on the R side of her body (around the heart); had very high blood pressure; The vaccine worsened her constipation problems; legs, feet, and ankles are swollen and sore; legs, feet, and ankles are swollen and sore; legs, feet, and ankles are swollen and sore; legs, feet, and ankles are swollen and sore; Dehydration; This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of BLOOD PRESSURE INCREASED (had very high blood pressure) and CHEST PAIN (extreme pain in her chest and abdomen on the R side of her body (around the heart)) in a 91-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 031A21A and 030M20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     The patient's past medical history included Hypertension. Concurrent medical conditions included Constipation.   On 27-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 27-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 28-Mar-2021, the patient experienced BLOOD PRESSURE INCREASED (had very high blood pressure) (seriousness criterion hospitalization prolonged) and DEHYDRATION (Dehydration). On 29-Mar-2021, the patient experienced CHEST PAIN (extreme pain in her chest and abdomen on the R side of her body (around the heart)) (seriousness criterion hospitalization). On 20-Apr-2021, the patient experienced JOINT SWELLING (legs, feet, and ankles are swollen and sore), PERIPHERAL SWELLING (legs, feet, and ankles are swollen and sore), PAIN IN EXTREMITY (legs, feet, and ankles are swollen and sore) and ARTHRALGIA (legs, feet, and ankles are swollen and sore). On an unknown date, the patient experienced CONSTIPATION (The vaccine worsened her constipation problems). The patient was hospitalized on 29-Mar-2021 due to BLOOD PRESSURE INCREASED and CHEST PAIN. At the time of the report, BLOOD PRESSURE INCREASED (had very high blood pressure), CHEST PAIN (extreme pain in her chest and abdomen on the R side of her body (around the heart)) and DEHYDRATION (Dehydration) had resolved and JOINT SWELLING (legs, feet, and ankles are swollen and sore), PERIPHERAL SWELLING (legs, feet, and ankles are swollen and sore), PAIN IN EXTREMITY (legs, feet, and ankles are swollen and sore), CONSTIPATION (The vaccine worsened her constipation problems) and ARTHRALGIA (legs, feet, and ankles are swollen and sore) outcome was unknown. Not Provided    DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 29-Mar-2021, Blood pressure measurement: 217/157 (High) 217/157.         Concomitant medications include Vault to treat constipation.  Treatment included amlodipine tablets.  Company comment: 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.; 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.