lost weight; laying on the floor; Shivering Severely; Vomiting (Throwing up severely); Drenched Clothes every 5 minutes/Sweats; Shaking; Crying from being sore; Sore Body; Dehydrated; Skin color became gray after vaccination; Trouble gaining weight after vaccination; Weakness continues; This spontaneous case was reported by a consumer and describes the occurrence of FALL (laying on the floor), CHILLS (Shivering Severely), VOMITING (Vomiting (Throwing up severely)), HYPERHIDROSIS (Drenched Clothes every 5 minutes/Sweats), TREMOR (Shaking), CRYING (Crying from being sore), MYALGIA (Sore Body), DEHYDRATION (Dehydrated), SKIN DISCOLOURATION (Skin color became gray after vaccination), WEIGHT GAIN POOR (Trouble gaining weight after vaccination), ASTHENIA (Weakness continues) and WEIGHT DECREASED (lost weight) in a 56-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination.     The patient's past medical history included Kidney stone and High cholesterol.    On 09-Apr-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 09-Apr-2021, the patient experienced FALL (laying on the floor) (seriousness criterion hospitalization), CHILLS (Shivering Severely) (seriousness criterion hospitalization), VOMITING (Vomiting (Throwing up severely)) (seriousness criterion hospitalization), HYPERHIDROSIS (Drenched Clothes every 5 minutes/Sweats) (seriousness criterion hospitalization), TREMOR (Shaking) (seriousness criterion hospitalization), CRYING (Crying from being sore) (seriousness criterion hospitalization), MYALGIA (Sore Body) (seriousness criterion hospitalization), DEHYDRATION (Dehydrated) (seriousness criterion hospitalization), SKIN DISCOLOURATION (Skin color became gray after vaccination) (seriousness criterion hospitalization), WEIGHT GAIN POOR (Trouble gaining weight after vaccination) (seriousness criterion hospitalization) and ASTHENIA (Weakness continues) (seriousness criterion hospitalization). On an unknown date, the patient experienced WEIGHT DECREASED (lost weight) (seriousness criterion hospitalization). On 10-Apr-2021, FALL (laying on the floor), CHILLS (Shivering Severely), HYPERHIDROSIS (Drenched Clothes every 5 minutes/Sweats), TREMOR (Shaking), CRYING (Crying from being sore), MYALGIA (Sore Body) and DEHYDRATION (Dehydrated) had resolved. On 10-May-2021, VOMITING (Vomiting (Throwing up severely)) had resolved. At the time of the report, SKIN DISCOLOURATION (Skin color became gray after vaccination), WEIGHT GAIN POOR (Trouble gaining weight after vaccination), ASTHENIA (Weakness continues) and WEIGHT DECREASED (lost weight) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 09-Apr-2021, Weight decreased: lost weight (went from 185lbs to 167lbs) (Low) Lost Weight (Went from 185Lbs to 167Lbs).     The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       Company Comment: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.; Sender's Comments: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.