Dizziness; Weakness; Difficulty breathing; Tiredness (severe fatigue); Muscle and joint pain within 20 minutes of vaccine in entire left arm (not the injection site itself, but entire left arm),; Muscle and joint pain within 20 minutes of vaccine in entire left arm (not the injection site itself, but entire left arm),; Muscle and joint pain within 20 minutes of vaccine in entire left arm (not the injection site itself, but entire left arm),; Muscle and joint pain within 20 minutes of vaccine in entire left arm (not the injection site itself, but entire left arm),; Heart pounding very hard; Tingling of tongue; Difficulty swallowing; Blood pressure taken at 10:37 A.M. was 143/86 with pulse of 61; This is a spontaneous report from a contactable consumer, the patient. A 45-year-old non-pregnant female patient received the first dose of BNT162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Lot Number: ER8731) via an unspecified route of administration in the left arm on 18Apr2021 at 09:15 (at the age of 45-years-old) as a single dose for COVID-19 immunisation. Medical history included hashimoto's disease, adrenal insufficiency, asthma, COVID-19 and postural orthostatic tachycardia syndrome (P.O.T.S) from having COVID on an unknown date in Apr2020. Prior to the vaccination, the patient was diagnosed with COVID-19. The patient did not receive any other vaccines within four weeks prior to the vaccination. The patient received other medicines (unspecified) within two weeks prior to the COVID-19 vaccine (reported as yes prescription medications). The patient previously took metronidazole (FLAGYL) for unknown indication on an unknown date and experienced drug allergy. On 18Apr2021 at 09:30, the patient experienced severe dizziness and weakness within 10 minutes of vaccine, difficulty breathing within 20 minutes of vaccination, tiredness (severe fatigue) within 15 minutes of vaccine, muscle and joint pain within 20 minutes of vaccination in entire left arm (not the injection site itself, but entire left arm). The patient's heart felt like pounding very hard within one hour of vaccination. The patient also had tingling of tongue and difficulty swallowing within one hour of vaccination. All symptoms listed were not normal after any vaccination the patient had ever received and also were not symptoms the patient had been having (except sudden onset of dizziness, which was a symptom of postural orthostatic tachycardia syndrome (P.O.T.S) that the patient had developed from having COVID, the first week of Apr2020. However, the patient was not having any dizziness prior to the vaccination on 18Apr2021. On 18Apr2021, at 10:37 the patient underwent blood pressure test and the result was 143/86 (unspecified units). On 18Apr2021, at 10:37 the patient underwent pulse rate test and the result was 61 (unspecified units). The events did not result in doctor or other healthcare professional office/clinic visit, emergency room/department or urgent care. Therapeutic measures were not taken as a result of the events. Since the vaccination, the patient had not been tested for COVID-19. The clinical outcome of the events dizziness, weakness, difficulty breathing, tiredness (severe fatigue), muscle pain, joint pain, injection site pain, entire left arm pain, heart pounding very hard, tingling of tongue, difficulty swallowing and blood pressure 143/86 were not recovered at the time of this report.   No follow-up attempts are needed. No further information is expected.