Depression/ Mild depressive symptoms; mental fog; Extreme fatigue; Interfered with activity; Unable to sleep; Increased anxiety; Bad chills; Muscle pain; Arm pain, left; Light headed/Dizziness; Weird feeling in her skin; Heart palpitations/ fast heartbeat, heart racing, pounding; The initial safety information received was reporting only non-serious adverse reaction(s). Upon receipt of follow-up information on 23Jul2021, this case now contains serious adverse reaction. Information processed together.  This is a spontaneous report from a contactable consumer (patient). A 28-year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number: ER8735), via an unspecified route of administration in left arm on 09Apr2021 at 12:00 (around noon) (at the age of 28-years-old) at dose 1, single for COVID-19 immunization. Medical history included seasonal allergy. Concomitant medication included ongoing cetirizine hydrochloride (ZYRTEC) tablet for seasonal allergy. There were no additional vaccines administered on the same date as BNT162B2. Prior vaccinations were reported as none. The vaccine was administered at a pharmacy. The patient mentioned that she knew that Pfizer does not recommended for an individual to get the second dose of the vaccine if they experienced severe allergic reactions during their first dose. Due to the kind of reaction she had, which was palpitation/fast heartbeat, she was asking if this could be classified under a severe reaction that would recommend a consultation with a doctor. She also experienced increasing anxiety and depression, among others. She would like to know if the reactions she had fall into a category that is contraindicated for the second dose. The patient also mentioned that she experienced left arm pain on 09Apr2021 in the evening which lasted for 1 day; lightheadedness when she woke up in the morning and weird feeling in her skin on Apr2021 (24-48 hours after the vaccine) which lessened in intensity and lasted for 2-3 weeks; bad chills and muscle pain on 10Apr2021 between 2 or 3 AM which lasted for a few hours; extreme fatigue and mental fog that interfered with her activities on 11Apr2021 in the morning, the fatigue lasted 2-3 weeks and the mental fog lasted at least a week; dizziness on 11Apr2021 in the morning that was very severe for about a week and then resolved in 2-3 weeks; heart palpitations, heart racing, pounding on Apr2021 (reported as day 2 or 3 after the vaccine) which lasted 2-3 weeks, but she still get heart racing, intermittently but improved, she also went to urgent care for the event; unable to sleep which coincided with her palpitations on 11Apr2021 at nighttime which has improved; increased anxiety on 10Apr2021 which lasted for 2-3 days; and depression/mild depressive symptoms on 19Apr2021 in the morning which lasted for 3 days. She mentioned that it has been 105 days since her first vaccine. The patient underwent lab tests and procedures which included first EKG and standard set of lab on Apr2021 and second EKG on Jul2021 which were all normal, and heart beat which was fast on Apr2021. The outcome of the "mental fog" and "increased anxiety" was recovered on Apr2021; recovered on 10Apr2021 for "arm pain, left", "bad chills", and "muscle pain"; recovered on 22Apr2021 for "depression/ mild depressive symptoms"; recovering for "heart palpitations/ fast heartbeat, heart racing, pounding" and "unable to sleep"; and recovered on an unspecified date in 2021 for "light headed/dizziness", "weird feeling in her skin", "extreme fatigue" and "interfered with activity".   Follow-up attempts are completed. No further information is expected.