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We were shocked earlier this month when we learned that Zac Efron had secretly completed not one but two stints in rehab this year, and now new allegations have surfaced about the extent of his drug use.

The National Enquirer reports that prior to seeking treatment, the former High School Musical star nearly overdosed on oxycodone at all-night party at a New York hotel suite. A source tells the publication that earlier this year the actor collapsed after snorting too much oxy. “I was scared for him,” an eyewitness said. “My worst fear was that he’d died from an overdose ... If Zac doesn’t clean himself up, he’ll be Hollywood’s next big drug tragedy.”

The Enquirer obtained a photo of the actor passed out after the alleged overdose, and the source revealed that Efron allegedly got the pills from the same dealer as Macauley Culkin. We had already heard about Efron's alleged abuse of cocaine and Molly (MDMA), and according to People, when Zac attended a bash last November for a pal (who was an "entertainment superstar's son"), he told his fellow partygoers that he was "rolling."

A source tells the mag:
    "He stood maybe one foot away from my face and kept saying, 'I've been up for four days. I haven't slept.' He was running around with his shirt off. He kept talking, going a mile a minute. He said something like he'd been on a party train."


It's not known when Zac's partying really started, but it seems like it could have been prompted by his split from Vanessa Hudgens in 2010. The magazine reports that when Efron was fresh from his five year relationship with Hudgens, he went on a serious coke bender in Las Vegas. "They were snorting coke and pulled an all nighter at the strip club, they went straight from the strip club to a pool party at like, noon," a source added.

When Zac's substance abuse got out of control and started interfering with his professional life, he reportedly turned to Adderall to perk up. "People on set thought he was acting weird," an insider revealed.

Thankfully the actor seems to be in a better place after seeking treatment this spring, and he's reportedly cut all of his former party pals out of his life.