Joint muscle cramps in his legs; like a mild case of the flu; pretty much slept; Tired; Sleepy; Joint pain; Low grade nausea; Headache; This spontaneous case was reported by a consumer and describes the occurrence of SOMNOLENCE (Sleepy), MUSCLE SPASMS (Joint muscle cramps in his legs), INFLUENZA LIKE ILLNESS (like a mild case of the flu), HYPERSOMNIA (pretty much slept) and ARTHRALGIA (Joint pain) in a 72-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 045C21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.   On 02-Nov-2021, the patient received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On an unknown date, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On an unknown date, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 02-Nov-2021, the patient experienced SOMNOLENCE (Sleepy), ARTHRALGIA (Joint pain), NAUSEA (Low grade nausea) and HEADACHE (Headache). On 03-Nov-2021, the patient experienced HYPERSOMNIA (pretty much slept) and FATIGUE (Tired). On an unknown date, the patient experienced MUSCLE SPASMS (Joint muscle cramps in his legs) and INFLUENZA LIKE ILLNESS (like a mild case of the flu). At the time of the report, SOMNOLENCE (Sleepy), MUSCLE SPASMS (Joint muscle cramps in his legs), INFLUENZA LIKE ILLNESS (like a mild case of the flu), HYPERSOMNIA (pretty much slept), ARTHRALGIA (Joint pain), NAUSEA (Low grade nausea), HEADACHE (Headache) and FATIGUE (Tired) had resolved.            No Concomitant product use was reported. No treatment information was provided.  The patient just got the booster of the Moderna vaccine and on that same day the patient had headache, joint pain, was sleepy and had low grade nausea but nothing serious. The next day they pretty much slept, and was tired, but now nothing. Reportedly, the patient also had joint muscle cramps in their legs. The patient was also confused if these effects came from the shot or not it would be like a mild case of the flu. This case concerns a 72-year-old male patient with no relevant medical history who experienced non-serious unexpected events of Somnolence, Muscle spasms, Hypersomnia, Influenza like illness, and non-serious expected events of Arthralgia, Nausea, Headache and Fatigue. The events occurred on the same day or the day after the third dose of Moderna COVID-19 vaccine. Temporal relationship for the events Muscle spasms and Influenza like illness is unknown as start date of the events was not provided. The rechallenge was not applicable as the events occurred following the third dose. Very limited information regarding clinical course of the events has been provided at this time. The benefit-risk relationship of Moderna COVID-19 vaccine is not affected by this report.; Sender's Comments: This case concerns a 72-year-old male patient with no relevant medical history who experienced non-serious unexpected events of Somnolence, Muscle spasms, Hypersomnia, Influenza like illness, and non-serious expected events of Arthralgia, Nausea, Headache and Fatigue. The events occurred on the same day or the day after the third dose of Moderna COVID-19 vaccine. Temporal relationship for the events Muscle spasms and Influenza like illness is unknown as start date of the events was not provided. The rechallenge was not applicable as the events occurred following the third dose. Very limited information regarding clinical course of the events has been provided at this time. The benefit-risk relationship of Moderna COVID-19 vaccine is not affected by this report.