fever; Dehydration; nausea; This is a spontaneous report received from a contactable consumer. The reporter is the patient.  A 66 year-old female patient received bnt162b2 (PFIZER/BIONTECH COVID-19 VACCINE), administered in arm, administration date 12Feb2021 (Lot number: EM9809) at the age of 66 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "Hashimotos thyroid disease," (unspecified if ongoing); "High blood pressure" (unspecified if ongoing); "Type II Diabetes" (unspecified if ongoing); "Osteoporosis" (ongoing), notes: penias now on prolea; "Sleep apnea" (unspecified if ongoing); "Bradycardia" (unspecified if ongoing); "Extremed dry eyes" (ongoing); "Cholesterol" (ongoing); "Arrhythmia" (ongoing). Concomitant medication(s) included: PERSOL PLUS taken for dry eye, blood pressure measurement; SYNTHROID taken for thyroid disorder, diabetes mellitus, blood cholesterol abnormal (ongoing); METFORMIN taken for thyroid disorder, diabetes mellitus, blood cholesterol (ongoing); CRESTOR taken for blood pressure measurement (ongoing); LISINOPRIL (ongoing); FLECAINIDE ACETATE taken for arrhythmia, cardiac disorder (ongoing); XANAX SR taken for osteoporosis (ongoing); PRILOSEC [OMEPRAZOLE] taken for osteopenia (ongoing); Topanol for Blood pressure. Vaccination history included: Bnt162b2 (PFIZER/BIONTECH COVID-19 VACCINE, First dose, Anatomical site of injection: Arm, Time(24hrs) Noon-ish, Lot. No: EL9262), administration date: 22Jan2021, when the patient was 66 years old, for COVID-19 Immunization, reaction(s): "She felt like little ill"; Hep a - adult(1) (Vaccine (Series):  Hep A - Adult(1) , Manufacturer: Glaxo smithkline, Lot Number:2424A2), administration date: 10Nov1997, when the patient was 43 years old, for immunization; Hep a - adult(2) (Vaccine (Series):  Hep A - Adult(2) , Manufacturer: Merck & Co., Inc, Lot Number:077IE, Dosage: 1.00cc), administration date: 11May1998, when the patient was 43 years old, for immunization; Hep b- adult(1) (Vaccine (Series):  Hep B - Adult(1) , Manufacturer: Glaxo smithkline, Lot Number:2424A2, Dosage: 1.0cc), administration date: 02Dec1997, when the patient was 43 years old, for immunization; Hep b- adult(2) (Vaccine (Series):  Hep B - Adult(2) , Manufacturer:Glaxo smithkline, Lot Number:2497A2, Dosage: 1.0cc), administration date: 20Apr1998, when the patient was 43 years old, for immunization; Hep b - adult(3) (Vaccine (Series):  Hep B - Adult(3) , Manufacturer:Glaxo smithkline, Lot Number:2720A2, Dosage: 1.0cc), administration date: 03Nov1998, when the patient was 44 years old, for immunization; Influenza split virus (Vaccine (Series):  Influenza split virus , Manufacturer: Sanofi Pasteur, Lot Number: U1936AA, Dosage: 0.5ML, Administering Tech:), administration date: 29Nov2005, when the patient was 51 years old, for immunization; Influenza seasonal inj, preservative fr (Vaccine (Series):  Influenza Seasonal inj, preservative Fr, Manufacturer: Sanofi Pasteur, Lot Number: UH890AA, Dosage: 0.5ML, VIS version: 26Jul2013, Administering Tech:), administration date: 19Sep2013, when the patient was 59 years old, for immunization; Influenza seasonal inj, preservative fr (Vaccine (Series):  Influenza Seasonal inj, preservative Fr, Manufacturer: bioCSL, Lot Number:U56106, Dosage: 0.5ML, VIS version: 07Aug2015, Administering Tech:), administration date: 22Sep2015, when the patient was 61 years old, for immunization; Influenza seasonal inj, preservative fr (Vaccine (Series):  Influenza Seasonal inj, preservative Fr, Manufacturer: Seqirus, Lot Number: WT54907, Dosage: 0.5ML, VIS version: 07Aug2015, Administering Tech:), administration date: 12Oct2016, when the patient was 62 years old, for immunization; Influenza seasonal injectabl, administration date: 18Sep2018, when the patient was 64 years old, for immunization; Influenza seasonal injectable, administration date: 07Oct2017, when the patient was 63 years old, for immunization; Influenza whole, administration date: 04Nov1996, when the patient was 42 years old, for immunization; Influenza whole (Vaccine (Series):  Influenza Whole, Manufacturer: Connaught, Lot Number: 7J81910, Dosage: 0.5CC), administration date: 02Dec1997, when the patient was 43 years old, for immunization; Influenza whole (Vaccine (Series):  Influenza Whole, Manufacturer: Wyeth, Lot Number: 4988247, Dosage: 0.5CC), administration date: 03Nov1998, when the patient was 44 years old, for immunization; Influenza whole (Vaccine (Series):  Influenza Whole, Manufacturer: Wyeth, Lot Number: 4008210, Dosage: 0.5ml), administration date: 18Dec2000, when the patient was 46 years old, for immunization; Influenza whole (Vaccine (Series):  Influenza Whole, Manufacturer: Sanofi Pasteur, Lot Number: U0686AB, Dosage: 0.5ml), administration date: 03Jan2002, when the patient was 47 years old, for immunization; Meningococcal mpsv4 (Vaccine (Series):  Meningococcal MPSV4, Manufacturer: Connaught, Lot Number:7F91830, Dosage: 0.5Cc), administration date: 02Dec1997, when the patient was 43 years old, for immunization; Novel influenza-htn1-09(1) (Vaccine (Series):  Novel Influenza-HTN1-09(1) , Manufacturer: Novartis pharmaceutical, Lot Number: 105050P, Dosage: 0.5ML, Administering Tech:), administration date: 05Feb2010, when the patient was 55 years old, for immunization; Opv(1), administration date: 12Oct1989, when the patient was 35 years old, for immunization; Pneumococcal ppv23, administration date: 04Nov1996, when the patient was 42 years old, for immunization; Pneumococcal ppv23, administration date: 18Sep2018, when the patient was 64 years old, for immunization; Ppd n/o (Vaccine (Series):  PPD N/O, Manufacturer: Connaught, Lot Number:244811), administration date: 20Apr1998, when the patient was 43 years old, for immunization; Rubella, administration date: 21Sep1982, when the patient was 28 years old, for immunization; Td (adult) adsorbed, administration date: 13Oct1989, when the patient was 35 years old, for immunization; Tdap (Vaccine (Series):  Tdap, Manufacturer: Glaxo smithkline, Lot Number: H54EX, Dosage: 0.5ML, VIS version: 24Feb2015, Administering Tech:), administration date: 05Aug2019, when the patient was 64 years old, for immunization; Typhoid -oral (Vaccine (Series):  Typhoid -oral, Manufacturer:  serum & vacci Ins , Lot Number: 146122B, Dosage: 4 caps), administration date: 02Dec1997, for immunization; Typhoid -vicps (Vaccine (Series):  Typhoid -Vicps, Manufacturer: Sanofi pasteur, Lot Number: P2A891M, Dosage: 0.5ML, VIS version: 29May2012, Administering Tech:), administration date: 05Aug2019, when the patient was 64 years old, for immunization; Yellow fever, administration date: 13Jan1992, when the patient was 37 years old, for immunization; Zoster live (Vaccine (Series):  Zoster live, Manufacturer: Merck & Co.Inc, Lot Number: K000996, Dosage: 0.65ML, VIS version: 06Oct2009, Administering Tech:), administration date: 26Aug2014, when the patient was 59 years old, for immunization; Zoster recombinant (Vaccine (Series):  Zoster recombinant, Manufacturer: Glaxo smithkline, Lot Number: N4C23, Dosage: 0.5ML, VIS version: 12Feb2018, Administering Tech:), administration date: 10Sep2019, when the patient was 65 years old, for immunization; Mmr, for immunization; measles vaccine, administration date: 1978, when the patient was 23 years old, for immunization, reaction(s): "gave her a full case plus was in hospital 2weeks in basic training ". The following information was reported: DEHYDRATION (medically significant) with onset Feb2021, outcome "unknown", described as "Dehydration"; PYREXIA (hospitalization, medically significant) with onset 13Feb2021 02:00, outcome "recovered" (Feb2021), described as "fever"; NAUSEA (medically significant) with onset Feb2021, outcome "recovered" (Feb2021), described as "nausea". On 13Feb2021 (2Am woke up), atient had probably fever earlier 2AM ish. Admitted in ICU Duration of stay: 3hours Approx. About 8-10 hours after vaccine the patient had fever over 102 degree worked hard at reducing fever with Tylenol plus electrolyte fluids but still got extreme dehydrated with nausea. The patient went to ER after 24hours Iv fluid, 2 antibiotics nausea medications, fever reduces in IV plus steroids within 2 days or 3 felt better. The patient got dehydrated very easily. Demonstrated felt she had a systemic allergy to 2nd vaccine not sure. The events "dehydration", "fever" and "nausea" were evaluated at the emergency room visit. The patient underwent the following laboratory tests and procedures: body temperature: (13Feb2021) 102 degree. Therapeutic measures were taken as a result of dehydration, pyrexia, nausea.  Follow-up attempts are completed. No further information is expected.