C.N.
I had the same reaction to tylenol with codeine. I had it once in college, took the doses for days, no problem, it worked like a charm. Just took it again last year, some 15 years later and it kept me awake all night long! Told the doctor and he said it can do that, never mentioned any allergy to the tylenol or the codeine. I take Tylenol tablets just fine with no reaction, in my case it was the codeine. Just ask the doctor for a different pain reliever. Good luck.