skin was burning itchy and red; skin was burning itchy and red; sunburn; trouble breathing; tongue swelling and discoloring; tongue swelling and discoloring/ he saw that his tongue was dark chocolate like he had just eaten a black licorice; felt like breaking out in hives/chest was beat red was referring to hives; chest started to get broken out and got beat red; allergic reaction; got beat red; This is a spontaneous report from a contactable consumer. A 43-year-old male patient received the first dose of BNT162B2 (BNT162B2, lot number: EP6955), via an unspecified route of administration in the left arm, on 15Mar2021 3:00 PM (received at the age of 43-years-old) at a single dose for COVID-19 immunisation. Medical history included Attention deficit disorder, cholesterol, benign heart palpitations. He also had a previous reaction to insect bites and followed up with an allergist.  He went over a decade ago for the insect bite, they gave him epinephrine at the urgent care and said to call or come back if it worsened. The next morning, his symptoms from the insect bite were worse and the urgent care told caller to go to the ED (emergency department). Concomitant medications included amfetamine aspartate, amfetamine sulfate, dexamfetamine saccharate, dexamfetamine sulfate (ADDERALL) from an unspecified date and ongoing for Attention deficit disorder; metoprolol from an unspecified date and ongoing for benign heart palpitations; simvastatin from an unspecified date and ongoing for cholesterol; vitamins and minerals; ubiquinol from an unspecified date and ongoing; fish oil from an unspecified date and ongoing. The patient previously had a flu shot in Aug2020. The patient previously took epinephrine and experienced insect bite were worse, and metoprolol and experienced reaction linger. The stated he thought he had an allergic reaction to the Pfizer covid19 vaccine on 15Mar2021.  He states that his tongue was swollen (15 min after receiving the vaccine, at 03:15 PM), he broke out into hives. He was in the restroom of the facility where he received the vaccine and that he did not have hives yet after getting the vaccine, but then asked the nurse if he could take Benadryl and was told yes. He states they then let him go because he had no trouble breathing at that time. He drove home and was going to reroute to hospitals if needed. He took 50 mg fast melt Benadryl as soon as walked out of the facility. He drank water, drank two larger bottles of water.  His chest started to get broken out and got beat red.  He took another 25 mg of Benadryl and then drove home. He then proceeded with Benadryl 50 mg every 6 hours. At 1 AM, the next morning (16Mar2021), he woke up with trouble breathing and tongue swelling and went to ER.  They gave him Prednisone 60 mg and then started on 5 days of prednisone.  They told him to continue Benadryl, and water and to follow up at hospital if worsens and to follow up with his physician. He stated that he had a previous reaction to insect bites and followed up with an allergist. He went over a decade ago for the insect bite, they gave him epinephrine at the urgent care and said to call or come back if it worsened. The next morning, his symptoms from the insect bite were worse and the urgent care told caller to go to the ED.  He added that this experience with the Covid19 vaccine was milder comparatively as they gave him just steroids and not epinephrine this time, and, they told him he was not having trouble breathing this time.  Last night, 16Mar2021, at around 10:30 pm, a half hour before next dose of 6 hour Benadryl was due, his skin was burning itchy and red so he took Benadryl a half hour early and set alarm to wake up before next dose. He woke up 4 hours later and waited to see if he would have a reaction and he has not taken it since. He took the morning dose of Prednisone with improvement and is carrying Benadryl in his pocket just in case. He later clarified that he took his 11 o'clock dose last night and then set a 2:30 am alarm to see if it was worse again or about the same. Regarding the allergic reaction, he first noticed around 3 pm Monday 15Mar2021.  Within 15 minutes after the vaccine, he was going through his phone and thought he felt strange while waiting at (Name) after the vaccine to see if he had a reaction. This feeling continued until 11 pm last night, 16Mar2021.  He took 50 mg of Benadryl when this first happened on 15Mar2021 and then took another 25 mg 15 minutes after the first initial dose. At the time of call, he notices no redness or itchiness or swelling of the tongue.  He feels like he is going in the right direction. He noticed tongue swollen within 15 minutes of receiving the vaccine and that it was also discolored (15Mar2021 15:15) and asked a friend who has allergic reactions if this happens and the friend told him that it sometimes happens to other people with allergic reactions.  He went to the ER on Tuesday 16Mar2021 at 3 am, exactly 12 hours after he received his shot, because of the swelling of the tongue. This was his first-time experiencing difficulty breathing and gasping for air as well.  States that he does not have it now. Prednisone and Benadryl have knocked it out. He was not admitted and was released from the ER about an hour and a half after he got there (discharged at 4:30 am from the ER). He did notice at 3:30 pm that his chest was beat red.  He was hanging out and his body would tell him when it was close to 6 hours that he needed to take Benadryl because he would be breaking out in hives.  He has to take Benedryl within 6 hours.  This is ongoing but he has not had any today.  He clarifies that the chest was beat red was referring to hives. He felt yesterday 16Mar2021 that he had a sunburn and that his face was kind of red but he had not been in the sun. He clarified on timeline that he went to check for swelling and hives in bathroom after receiving the vaccine on 15Mar2021. At that time, he saw that his tongue was dark chocolate like he had just eaten a black licorice. There was no redness or anything but he felt like it was going to be occurring so he asked the facility if he could take Benadryl. He is scheduled for his second dose of the vaccine on 05Apr2021 and may be possibly returning but is not sure. He also noticed on Tuesday 16Mar2021 that while sleeping on the couch at 3 am he was going to take the next dose of Benadryl and woke up gasping for air.  He got up to drink more water and took a shower and made coffee.  Then, he went to the ER.  He was really tired.  He wanted to be alert to drive.  It seemed like the water helped and he drank a lot of water.  He did not want to take the next dose of Benadryl.  He noticed that it did get better, and he did not want to stay home so he went to the ER. Outcome of the event allergic reaction was recovered with sequel on 16Mar2021. Outcome of swollen tongue, skin was burning itchy and red, got beat red and hives was recovering. Outcome of other events was unknown.