Difficulty breathing, Shortness of breath; Fast heartbeat; Feeling Sick; No appetite; no energy at all this morning; cough; Fatigue/Tired; Chils; This spontaneous case was reported by a consumer and describes the occurrence of DYSPNOEA (Difficulty breathing, Shortness of breath), TACHYCARDIA (Fast heartbeat) and COUGH (cough) in a 78-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 007M20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     The patient's past medical history included Pacemaker insertion (cardiac). Concomitant products included ALLOPURINOL, CLOPIDOGREL, METOPROLOL, PANTOPRAZOLE, ISOSORBIDE, AMLODIPINE, FUROSEMIDE, RIVAROXABAN (XARELTO) and ATORVASTATIN for an unknown indication.    On 10-Feb-2021, the patient received dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 10-Feb-2021, the patient experienced DYSPNOEA (Difficulty breathing, Shortness of breath) (seriousness criterion medically significant), TACHYCARDIA (Fast heartbeat) (seriousness criterion medically significant), MALAISE (Feeling Sick), DECREASED APPETITE (No appetite), ASTHENIA (no energy at all this morning), COUGH (cough) (seriousness criterion medically significant), FATIGUE (Fatigue/Tired) and CHILLS (Chils). The patient was treated with BENZONATATE for Cough, at a dose of 200 milligram and AZITHROMYCIN (Z-PAK) for Cough, at an unspecified dose and frequency. At the time of the report, DYSPNOEA (Difficulty breathing, Shortness of breath), TACHYCARDIA (Fast heartbeat), ASTHENIA (no energy at all this morning), COUGH (cough) and FATIGUE (Fatigue/Tired) had not resolved and MALAISE (Feeling Sick), DECREASED APPETITE (No appetite) and CHILLS (Chils) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Blood pressure measurement: normal (normal) normal. On an unknown date, X-ray: normal (normal) Normal,X-ray shows that his chest was clear with no respiratory issue.     The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       Company comment: This case concerns a 78 year-old male patient with a history of cardiac pacemaker insertion who experienced the unexpected     event of dyspnea, cough, and tachycardia. The event occurred approximately 1 day after vaccination with mRNA-1273 vaccine. The rechallenge was unknown as information only about one dose was provided. The medical history of cardiac pacemaker insertion remains a confounder for tachycardia. The benefit-risk relationship of mRNA-1273 is not affected by this report.   Most recent FOLLOW-UP information incorporated above includes: On 10-Mar-2021: Upon internal review on 15-Nov-2021, company comment was added in the case.; Sender's Comments: This case concerns a 78 year-old male patient with a history of cardiac pacemaker insertion who experienced the unexpected     event of dyspnea, cough, and tachycardia. The event occurred approximately 1 day after vaccination with mRNA-1273 vaccine. The rechallenge was unknown as information only about one dose was provided. The medical history of cardiac pacemaker insertion remains a confounder for tachycardia. The benefit-risk relationship of mRNA-1273 is not affected by this report.