Within 5 minutes of shot I felt off-balanced and pressure in my forehead. It hurt but it wasn't a true headache.  I felt the pressure all over my head, in the back and all over.; Within 5 minutes of shot I felt off-balanced and pressure in my forehead. It hurt but it wasn't a true headache.  I felt the pressure all over my head, in the back and all over.; Heart pounding lasted for 10 hours; flushing, my face turned really red; I'm uncomfortable with the heart issue; This spontaneous case was reported by a consumer and describes the occurrence of BALANCE DISORDER (Within 5 minutes of shot I felt off-balanced and pressure in my forehead. It hurt but it wasn't a true headache.  I felt the pressure all over my head, in the back and all over.), HEADACHE (Within 5 minutes of shot I felt off-balanced and pressure in my forehead. It hurt but it wasn't a true headache.  I felt the pressure all over my head, in the back and all over.), PALPITATIONS (Heart pounding lasted for 10 hours), FLUSHING (flushing, my face turned really red) and DISCOMFORT (I'm uncomfortable with the heart issue) in a 61-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 001A21A) for COVID-19 vaccination.     No Medical History information was reported.    On 04-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 04-Mar-2021, the patient experienced BALANCE DISORDER (Within 5 minutes of shot I felt off-balanced and pressure in my forehead. It hurt but it wasn't a true headache.  I felt the pressure all over my head, in the back and all over.), HEADACHE (Within 5 minutes of shot I felt off-balanced and pressure in my forehead. It hurt but it wasn't a true headache.  I felt the pressure all over my head, in the back and all over.), PALPITATIONS (Heart pounding lasted for 10 hours), FLUSHING (flushing, my face turned really red) and DISCOMFORT (I'm uncomfortable with the heart issue). On 05-Mar-2021, BALANCE DISORDER (Within 5 minutes of shot I felt off-balanced and pressure in my forehead. It hurt but it wasn't a true headache.  I felt the pressure all over my head, in the back and all over.), HEADACHE (Within 5 minutes of shot I felt off-balanced and pressure in my forehead. It hurt but it wasn't a true headache.  I felt the pressure all over my head, in the back and all over.), PALPITATIONS (Heart pounding lasted for 10 hours) and DISCOMFORT (I'm uncomfortable with the heart issue) had resolved and FLUSHING (flushing, my face turned really red) outcome was unknown. Unknown    DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 04-Mar-2021, Blood pressure measurement: elevated High.     The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       Treatment information was not provided. /unknown.  Concomitant product use was not provided/unknown by the reporter.  The consumer spoke to her HCP regarding her symptoms and was told her symptoms were mild and recommended the second dose. The consumer states that she still does not feel comfortable getting the second dose due to her heart pounding and blood pressure staying elevated for 45 minutes after the first dose. The consumer also notes that she does not have a history of a heart condition.