May have experienced pericarditis; Stiff neck; Shooting pains in her chest/pain deep in chest/chest pains are better but "still at bay"/chest pains are now just a dull ache/no longer a severe, sharp burning pain in the chest.; Shortness of breath; Scary; Severe inflammation; Got worse when she laid down//went to bed; too weak last night to do anything; Nausea; Fever; Chills; Headache/shooting pains in her head; This spontaneous case was reported by a consumer and describes the occurrence of PERICARDITIS (May have experienced pericarditis) in a 67-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 033F21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Sulfonamide allergy (drug allergy to sulfa and gluten), Hashimoto's disease (Hashimoto's disease and she treats with a compounded T3/T4 medication.) and Gluten sensitivity. Concomitant products included T3/T4 SUPPORT for Hashimoto's disease.    On 18-Nov-2021, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 18-Nov-2021, the patient experienced PERICARDITIS (May have experienced pericarditis) (seriousness criterion medically significant), MUSCULOSKELETAL STIFFNESS (Stiff neck), CHEST PAIN (Shooting pains in her chest/pain deep in chest/chest pains are better but "still at bay"/chest pains are now just a dull ache/no longer a severe, sharp burning pain in the chest.), DYSPNOEA (Shortness of breath), FEAR (Scary), INFLAMMATION (Severe inflammation), CONDITION AGGRAVATED (Got worse when she laid down//went to bed), ASTHENIA (too weak last night to do anything), NAUSEA (Nausea), PYREXIA (Fever), CHILLS (Chills) and HEADACHE (Headache/shooting pains in her head). The patient was treated with IBUPROFEN 19-Nov-2021 for Chest pain, at a dose of 1 dosage form three times a day and ACETAMINOPHEN on 19-Nov-2021 at a dose of 1 dosage form. At the time of the report, PERICARDITIS (May have experienced pericarditis), MUSCULOSKELETAL STIFFNESS (Stiff neck), DYSPNOEA (Shortness of breath), FEAR (Scary), INFLAMMATION (Severe inflammation), CONDITION AGGRAVATED (Got worse when she laid down//went to bed), ASTHENIA (too weak last night to do anything), NAUSEA (Nausea), PYREXIA (Fever), CHILLS (Chills) and HEADACHE (Headache/shooting pains in her head) outcome was unknown and CHEST PAIN (Shooting pains in her chest/pain deep in chest/chest pains are better but "still at bay"/chest pains are now just a dull ache/no longer a severe, sharp burning pain in the chest.) was resolving.            Company Comment: This is a spontaneous case concerning a 67 years old, female patient with clinical history of Hashimoto's disease who experienced the expected event of PERICARDITIS (AESI) and the unexpected events of MUSCULOSKELETAL STIFFNESS, CHEST PAIN, DYSPNOEA, FEAR, INFLAMMATION, CONDITION AGGRAVATED, ASTHENIA, NAUSEA, PYREXIA, CHILLS and HEADACHE. The events occurred the same day after the third dose of mRNA-1273 vaccine. The rechallenge was not applicable since only information about the third dose was disclosed. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.; Sender's Comments: This is a spontaneous case concerning a 67 years old, female patient with clinical history of Hashimoto's disease who experienced the expected event of PERICARDITIS (AESI) and the unexpected events of MUSCULOSKELETAL STIFFNESS, CHEST PAIN, DYSPNOEA, FEAR, INFLAMMATION, CONDITION AGGRAVATED, ASTHENIA, NAUSEA, PYREXIA, CHILLS and HEADACHE The events occurred the same day after the third dose of mRNA-1273 vaccine The rechallenge was not applicable since only information about the third dose was disclosed The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.