How partying too much can hurt you: we don't want to be a buzz kill, but raging on the weekends--even if you chill during the week--is a lot more dangerous than you think. Just hear us out on this one.(Special Report)

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* From Monday through Thursday, 27-year-old Uyen Nguyen rarely drinks. But come Friday night, she's ready to kick back and party. While her nights on the town are usually a blast, the aftermath sometimes isn't. Recently, Uyen and some friends pounded back beers at a bar and then headed to a party where shots of hard liquor just kept coming. "I lost track of how many shots I did ... and pretty much everything else," she admits. "Early the next morning, I woke up in a pool of vomit, and I was so hungover, I thought I was going to die."

Uyen's experience--and the fact that it didn't deter her from getting plastered again (though ...