07/28/2009 05:12 am ET Updated May 25, 2011

Michael Jackson's Supposed Drug Cocktail: Demerol, Dilaudid, Vicodin, Zoloft, Xanax...

Jacko, 50, was taking up to THREE powerful narcotic pain relievers at the same time when any more than one is deemed potentially fatal. Sources close to the singer's entourage said he was injected three times a day with Demerol - the potent painkiller given to him before his collapse at home in LA on Thursday.

Jacko, who suffered a heart attack, was taking another painkiller, Dilaudid. And sources said he had recently been prescribed yet ANOTHER narcotic pain reliever, Vicodin.

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