Allergic to nsaids so take tylenol (acetaminophen) for chronic pain/med conditions. had mild hives/flushing 8-9hrs after taking, but get hives anyway. caused by tyln?

Use with Caution: Tylenol (acetaminophen) is associated with severe liver damage at surprisingly low doses (like 4000mg per day). You need medical evaluation asap. Are you possibly taking tylenol (acetaminophen) with codeine? This can also cause flushing.

Unlikely: True hives are a rare complication of tylenol (acetaminophen). With a prior history of recurrent hives, that is a far more likely cause.