seemed to have much more severe reaction; Memory loss gets worse after having a larger dose of insulin at night; Pain in the arm and back gets worse after having a larger dose of insulin at night; Pain in the arm and back gets worse after having a larger dose of insulin at night; Feeling too hot in the night time; Feeling so bad gets worse after having a larger dose of insulin at night; Dizziness gets worse after having a larger dose of insulin at night; This spontaneous case was reported by a consumer and describes the occurrence of AMNESIA (Memory loss gets worse after having a larger dose of insulin at night), PAIN IN EXTREMITY (Pain in the arm and back gets worse after having a larger dose of insulin at night), BACK PAIN (Pain in the arm and back gets worse after having a larger dose of insulin at night), FEELING HOT (Feeling too hot in the night time) and FEELING ABNORMAL (Feeling so bad gets worse after having a larger dose of insulin at night) in a 79-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 052E21A and 040C21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Allergy to antibiotic (Reported as allergic to most antibiotics except Zithromax), Allergy to allopathic drugs (Reported as allergic to cough syrup), Food allergy (Any-sugar free food), Pollen allergy, Allergy (reported as allergic to red dye), Egg allergy, Meat allergy (Reported as allergic to chicken), Meat allergy (Reported as allergic to Turkey), Drug allergy (Allergic to sulfur drug), Penicillin allergy, Bronchial asthma (for 20 years) and Diabetes (for 20 years). Concomitant products included INSULIN ASPART for Diabetes.   On 15-Jul-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 12-Aug-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 12-Aug-2021, the patient experienced AMNESIA (Memory loss gets worse after having a larger dose of insulin at night), PAIN IN EXTREMITY (Pain in the arm and back gets worse after having a larger dose of insulin at night), BACK PAIN (Pain in the arm and back gets worse after having a larger dose of insulin at night), FEELING HOT (Feeling too hot in the night time), FEELING ABNORMAL (Feeling so bad gets worse after having a larger dose of insulin at night) and DIZZINESS (Dizziness gets worse after having a larger dose of insulin at night). On an unknown date, the patient experienced ADVERSE REACTION (seemed to have much more severe reaction). At the time of the report, AMNESIA (Memory loss gets worse after having a larger dose of insulin at night), PAIN IN EXTREMITY (Pain in the arm and back gets worse after having a larger dose of insulin at night), BACK PAIN (Pain in the arm and back gets worse after having a larger dose of insulin at night), FEELING HOT (Feeling too hot in the night time), FEELING ABNORMAL (Feeling so bad gets worse after having a larger dose of insulin at night), DIZZINESS (Dizziness gets worse after having a larger dose of insulin at night) and ADVERSE REACTION (seemed to have much more severe reaction) outcome was unknown.            No treatment medications were provided.  Patient reported that She needed to stay near the AC when feeling hot. Patient thought of cutting off her required dose at night so patient will feel better and patient want to confirm whether she could stop the insulin or lower the dose.   This case was linked to MOD-2021-286443 (Patient Link).   Reporter did not allow further contact   Most recent FOLLOW-UP information incorporated above includes: On 15-Aug-2021: Added Concomitant medication insulin was updated to Insulin NovoLog and event adverse reaction were added and narrative was update accordingly.