Feel flushed and had a fast heart rate; Feel flushed and had a fast heart rate; This is a spontaneous report from a contactable other HCP. This other HCP reported for a 35-year-old male patient that:   Reporter type: Healthcare Professional reporting for a patient Age group: Adult (18-64 Years) Current age: 25 Current age unit: Years Medical qualification reporter: Other Health Professional Covid vaccine details: [{Product=COVID 19, Administration date=18Dec2020, Administrator route=Intramuscular, Dose number=1}] If other vaccine in four weeks: Unknown Adverse event: Caregiver received his first COVID-19 vaccine, was observed without issues for 15 minutes; left ambulatory. States he got up to the top of the stairs and started to feel flushed and had a fast heart rate. Came back to observation area. Set timer for additional 15 minutes of observation. Patient appeared to be in NAD, skin color WNLs, no c/o SOB or difficulty swallowing. Given a bottle of water. No issues during additional 15 minute observation. Left ambulatory; stated feeling much better. Informed him to mention this before his 2nd vaccine dose so that he can be observed longer. If treatment AE: No If covid prior vaccination: Unknown If covid tested post vaccination: Unknown  Serious: No Seriousness criteria-Results in death: No Seriousness criteria-Life threatening: No Seriousness criteria-Caused/prolonged hospitalization: No Seriousness criteria-Disabling/Incapacitating: No Seriousness criteria-Congenital anomaly/birth defect: No  Reaction(s)/Event(s): Reaction/event as reported by primary source: Caregiver received his first COVID-19 vaccine, was observed without issues for 15 minutes; left ambulatory. States he got up to the top of the stairs and started to feel flushed and had a fast heart r Reaction/event in MedDRA terminology (LLT): Caregiver received his first COVID-19 vaccine, was observed without issues for 15 minutes; left ambulatory. States he got up to the top of the stairs and started to feel flushed and had a fast heart rate. Came back to observation area. Set timer for  Drug(s) Information: Characterization of drug role: Suspect Route of administration: Intramuscular Date of start of drug: 18Dec2020 Dose number: 1  Active drug substance information: Active drug substances name: COVID 19  Narrative case summary and further information: Case narrative Age at vaccination: 25 Years  Did the patient receive any other vaccines within 4 weeks prior to the COVID vaccine: Unknown  Reported Event: Caregiver received his first COVID-19 vaccine, was observed without issues for 15 minutes; left ambulatory. States he got up to the top of the stairs and started to feel flushed and had a fast heart rate. Came back to observation area. Set timer for additional 15 minutes of observation. Patient appeared to be in NAD, skin color WNLs, no c/o SOB or difficulty swallowing. Given a bottle of water. No issues during additional 15 minute observation. Left ambulatory; stated feeling much better. Informed him to mention this before his 2nd vaccine dose so that he can be observed longer.   Was treatment received for the adverse event?: No  Prior to vaccination, was the patient diagnosed with COVID-19?:Unknown Since the vaccination, has the patient been tested for COVID-19?:Unknown  No follow up attempts are possible. Information about Lot and batch number could not be obtained. No further information is expected.