6 regular strength Vicodin tablets means 3 full grams of acetaminophen.
If they were Vicodin ES, than that would be 4.5 grams of acetaminophen.
The absolute max per DAY of acetaminophen that anybody should EVER take is 4 grams.
Any more than that, and you can cause serious irreparable damage to your liver.
This assumes no alcohol consumption at all.
Alcohol is also toxic to the liver.
It is possible to cause hepatoxicity with just a "regular dose" of Tylenol (1 gram of acetaminophen) combined with a few drinks (I don't mean "a case of beer" I mean just a few, as in 3 or 4 beers)
Doing something like combining 3+ grams of acetaminophen AND 500ml of 80 proof liquor in the same day is EXTREMELY dangerous and stupid. You are really really gambling with your life. Check in to a hospital and have them pump your stomache. For your sake, hopefully you aren't too late.
DO NOT EVER EVER EVER EVER EVER MIX ANYTHING WITH ACETAMINOPHEN WITH ANYTHING WITH ALCOHOL.
I don't give a crap if some idiot junkie wants to get high, but at least put some thought in before you start mixing stupid combinations of stuff together.
I don't recommend ever taking any controlled substances without a legal prescription from a doctor and a legit reason to take it, but if you are going to dabble in that crap, then make damn sure to get something with no acetaminophen in it. Something along the lines of Booze + Vicoprofen (which has Ibuprofen instead of Acetaminophen) is less likely to cause a painful death (though I'm sure the combination is gonna be pretty hard on your stomach, you're risking ulcers instead of death.)
Edit: I don't know if this is possible at all, but perhaps it would be a good idea to have a moderator get the IP addy of the OP and contact the OP's ISP that the OP has overdosed on an Acetaminophen and Alcohol combination (Assuming they are a 24 hour ISP), and to have the ISP either give the OP's address, or contact the local 911 center to get an ambulance out to him.) If he lets this go until tomorrow, he may potentially be a corpse.