Codeine gives me anxiety and nightmares.
I think its just the worry not the codine you are looking for an excuse for your anxiety . 1 med I must tell posters about if on shrink meds is TRAMADOL I reacted to this pain killer like a bad LSD tripper . that was just me, but something to remember
You seem to be over worrying and taking what you did for a headache is like using an atom bomb to kill an ant. You will be fine but use this a future lesson.
Codeine can have this effect on some people. The question is, how did you get Co-Tylenol just for a headache?
I don't know if codeine has that effect or not. But are you prone to having panic attacks? If you are and even if you are not you may experiencing it and the fact you took that pill is you analyzing and trying to figure out why you are feeling this way. I used to try to figure out why and sometimes there is no simple answer it just is. Try breathing in through your nose and out through your mouth slowly and see if this helps you relax. Sorry you are going through this, good luck.