He seems to be more forgetful than normal; Kept him awake the first night with pain; Pain in the arm; This spontaneous case was reported by a consumer and describes the occurrence of MEMORY IMPAIRMENT (He seems to be more forgetful than normal), INSOMNIA (Kept him awake the first night with pain) and PAIN IN EXTREMITY (Pain in the arm) in a 64-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination.     The patient's past medical history included Heart failure, Aortic valve repair NOS and Defibrillator/pacemaker insertion. Concurrent medical conditions included Congenital heart disease NOS since 1957, Myocarditis (Two to three weeks ago.) and Fluid retention (In heart muscle. About two to three weeks ago.). Concomitant products included AMIODARONE, WARFARIN, ATORVASTATIN and METOPROLOL for an unknown indication.   On 21-Oct-2021, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to .5 milliliter. On an unknown date, the patient received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On an unknown date, received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. In October 2021, the patient experienced MEMORY IMPAIRMENT (He seems to be more forgetful than normal), INSOMNIA (Kept him awake the first night with pain) and PAIN IN EXTREMITY (Pain in the arm). At the time of the report, MEMORY IMPAIRMENT (He seems to be more forgetful than normal) outcome was unknown and INSOMNIA (Kept him awake the first night with pain) and PAIN IN EXTREMITY (Pain in the arm) had resolved.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   Treatment information was not provided.  This case concerns a 64-year-old male patient with the medical history of heart failure, aortic valve repair NOS and defibrillator/pacemaker insertion, and concurrent medical conditions of Congenital heart disease NOS, myocarditis (Two to three weeks ago.) and fluid retention (In heart muscle about two to three weeks ago.), who experienced the unexpected non serious events of memory impairment, insomnia, and pain in extremity. The events occurred unknown number of days after the third dose of mRNA-1273 vaccine. Patient received full dose for his third booster dose. There is lack of information about the first dose and second dose. The rechallenge was not applicable, as the events occurred after the third dose and no additional dosing will be given. The benefit-risk relationship of the vaccine in not affected by this report.; Sender's Comments: This case concerns a 64-year-old male patient with the medical history of heart failure, aortic valve repair NOS and defibrillator/pacemaker insertion, and concurrent medical conditions of Congenital heart disease NOS, myocarditis (Two to three weeks ago.) and fluid retention (In heart muscle about two to three weeks ago.), who experienced the unexpected non serious events of memory impairment, insomnia, and pain in extremity. The events occurred unknown number of days after the third dose of mRNA-1273 vaccine. Patient received full dose for his third booster dose. There is lack of information about the first dose and second dose. The rechallenge was not applicable, as the events occurred after the third dose and no additional dosing will be given. The benefit-risk relationship of the vaccine in not affected by this report.