Myoclonus seizures; His face went numb and the rest of body went numb/everything feels springing when walking on the inside and the outside of his body because of the numbness; face red swollen and thick tongue swollen; blood pressure lower one was 121 elevated; constant so sore throat and throat swelling; deep hoarse sound to his throat which is not how he normally sounds when speaking; spikes of heat within his body, almost neurological and like hot flashes; lost ten pounds of weight; decreased appetite; loud ringing in ears; inside of his mouth described as chewed up, due to loss of sensation due to numbness and swelling; constant so sore throat and throat swelling; severe anaphylactic reaction including that he could not breath; tongue was thick and swollen; swollen glands on both sides of neck; feels like he is almost in a dream state; trouble keeping his balance, described as being still wobbly; Severe anaphylactic reaction including that he could not breath; left side chest pain; blurry vision; This spontaneous case was reported by an other and describes the occurrence of ANAPHYLACTIC REACTION (Severe anaphylactic reaction including that he could not breath) and SEIZURE (Myoclonus seizures) in a 56-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 018BZ1A) for COVID-19 immunisation. The occurrence of additional non-serious events is detailed below.     The patient's past medical history included Allergy to arthropod sting. Concomitant products included VERAPAMIL, HYDROCHLOROTHIAZIDE and CELECOXIB (CELEXA [CELECOXIB]).    On 25-Mar-2021, the patient received dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 27-Mar-2021, the patient experienced VISION BLURRED (blurry vision) and CHEST PAIN (left side chest pain). On 29-Mar-2021, the patient experienced ANAPHYLACTIC REACTION (Severe anaphylactic reaction including that he could not breath) (seriousness criterion medically significant). On an unknown date, the patient experienced SEIZURE (Myoclonus seizures) (seriousness criterion medically significant), HYPOAESTHESIA (His face went numb and the rest of body went numb/everything feels springing when walking on the inside and the outside of his body because of the numbness), SWELLING (face red swollen and thick tongue swollen), BLOOD PRESSURE INCREASED (blood pressure lower one was 121 elevated), STOMATITIS (constant so sore throat and throat swelling), DYSPHONIA (deep hoarse sound to his throat which is not how he normally sounds when speaking), HOT FLUSH (spikes of heat within his body, almost neurological and like hot flashes), DREAMY STATE (feels like he is almost in a dream state), BALANCE DISORDER (trouble keeping his balance, described as being still wobbly), WEIGHT DECREASED (lost ten pounds of weight), DECREASED APPETITE (decreased appetite), TINNITUS (loud ringing in ears), SENSORY LOSS (inside of his mouth described as chewed up, due to loss of sensation due to numbness and swelling), OROPHARYNGEAL PAIN (constant so sore throat and throat swelling), DYSPNOEA (severe anaphylactic reaction including that he could not breath), TONGUE DISORDER (tongue was thick and swollen) and LYMPHADENOPATHY (swollen glands on both sides of neck). The patient was treated with ACETAMINOPHEN (TYLENOL) on 05-Apr-2021 at an unspecified dose and frequency and DIPHENHYDRAMINE HYDROCHLORIDE (BENADRYL A) on 05-Apr-2021 at a dose of 50 mg. At the time of the report, ANAPHYLACTIC REACTION (Severe anaphylactic reaction including that he could not breath), SEIZURE (Myoclonus seizures), HYPOAESTHESIA (His face went numb and the rest of body went numb/everything feels springing when walking on the inside and the outside of his body because of the numbness), SWELLING (face red swollen and thick tongue swollen), BLOOD PRESSURE INCREASED (blood pressure lower one was 121 elevated), STOMATITIS (constant so sore throat and throat swelling), DYSPHONIA (deep hoarse sound to his throat which is not how he normally sounds when speaking), HOT FLUSH (spikes of heat within his body, almost neurological and like hot flashes), VISION BLURRED (blurry vision), DREAMY STATE (feels like he is almost in a dream state), BALANCE DISORDER (trouble keeping his balance, described as being still wobbly), CHEST PAIN (left side chest pain), WEIGHT DECREASED (lost ten pounds of weight), DECREASED APPETITE (decreased appetite), TINNITUS (loud ringing in ears), SENSORY LOSS (inside of his mouth described as chewed up, due to loss of sensation due to numbness and swelling), OROPHARYNGEAL PAIN (constant so sore throat and throat swelling), DYSPNOEA (severe anaphylactic reaction including that he could not breath) and LYMPHADENOPATHY (swollen glands on both sides of neck) was resolving and TONGUE DISORDER (tongue was thick and swollen) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.       Based on the current available information and the temporal association of the product use and the start date of the events a causal relationship cannot be excluded.; Sender's Comments: Based on the current available information and the temporal association of the product use and the start date of the events a causal relationship cannot be excluded.