Hi lordpoison,
You should never mix alcohol with most medications but this is especially true with all opiates and acetaminophen.
It has happened, though not common, that a one time mix of alcohol and acetaminophen has caused irreversible damage. Be very cautious in the future.
Take Care,
~Tuck
It's never a good idea to mix any medications, including over the counter meds, with alcohol - and especially any meds with acetaminophen (the active ingredient in paracetamol or tylenol). This can increase the risk for liver damage.
However, if this was a one time happening, I would say your chances of developing any problems from this one time event would be very low. I will say, however, if you are a regular or heavy drinker, you probably should avoid anything with acetaminophen in it (be sure to read labels because it's in a lot of cold and allergy meds also).