Flu shot Reaction

Friday around 11 Tristan got his follow-up seasonal flushot. He was fine the rest of the day and on Saturday night he was scheduled to have a sleepover with my aunt and cousins so mommy and daddy could have a night out. At around 2 o'clock in the morning my aunt called and said he woke up crying and wanted to cuddle and was very warm. We picked him up and gave him the amount of tylenol on the bottle. Later Sunday afternoon he got so hot and flushed we decided we had to take him to the hospital. When we arrived his temperature was 104.5. They gave him a mega dose of tylenol and motrin and admitted him to make sure the temp came down. They also told me the back of the bottle dosage of tylenol was not enough and it was a "safe" dosage. So I do not know if Tristan will be getting a flu shot again!