Felt extremely thirsty; Hives on forehead; It was 12:45 by then and she took 2 of them.  She fell asleep until about 6pm; Tickle in throat and inside of cheek and mouth felt funny sensation; Tickle in throat and inside of cheek and mouth felt funny sensation; Skin was super hot and face was beet red; Skin was super hot and face was beet red; Bottom lip started to feel numb; she was nervous; Felt a surge of heat that went into head; Allergic reaction; This is a spontaneous report from a contactable consumer.   A 54-year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, solution for injection), dose 1 intramuscular, administered in left arm on 02Apr2021 11:45 (Batch/Lot Number: ER8737) as dose 1, 0.3 ml single (at the age of 54 years old) for COVID-19 immunisation.  Medical history included hypothyroidism, bronchitis and hypertension. Concomitant medications included levothyroxine taken for hypothyroidism, start and stop date were not reported.  On Friday, she had it at 11:45 and waited the 15 minutes as suggested.  Immediately after injection, she had an allergic reaction she felt a surge of heat that went to her head and she thought maybe it was because she was nervous at 11:46.  As she was sitting there, her bottom lip started to feel numb at 11:52.  She just thought it was because she was nervous and hot.  Then the pharmacist asked if she was okay.  She felt extremely thirsty at 12:01.  She left and bought a bottle of water and when she took off mask, she was flushed and drank water.  About 10 minutes later, her skin was super hot and face was beet red at 12:20.  She had a tickle in her throat and the inside of her cheek and mouth felt like a funny sensation at 12:25.  She called the pharmacist and explained it and now she was having a problem with throat and her face was super hot and red at 12:25-12:30.  She suggested she take Benadryl right away.  It was 12:45 by then and she took 2 of them.  She fell asleep until about 6pm.  When she woke up, her face was better.  She felt better, but not 100%.  She slept most of the day.  On Saturday, she had a doctor's appointment with  a holistic nutritionist.  She went to that appointment at 10:30 and felt a tickle in her throat and had the thirst again.  She panicked and went into a convenience store and got the packets of Benadryl and took 2 because she felt the same way she did right after the vaccine.  She provided information off the Benadryl box of Lot AAC126 and expiration is Oct2022.  The packet of Benadryl is expiration of Jan2022, with Lot GS13761.  When she spoke with Pharmacist, she said if Benadryl did not work to go to the Emergency room, but it worked, so she did not need to go. She took a Benadryl because she had hives on forehead on 05Apr2021 at 08:30. She took Benadryl at 12:45 Friday because she did not have any. On Saturday she took some more on the way to her doctor's appt.  She felt better when she woke up and as she was driving, she got super thirsty and had the tickle in her throat.  They recommended she not take the second dose but she will speak with her doctor about it. The outcome of the events was recovering.   No follow-up attempts are possible. No further information is expected.