Brooke Mueller’s assistant found her passed out and unresponsive on Friday morning, and called 911 thinking Brooke had overdosed.  Considering Brooke’s huge problem with substance abuse in the past, this wasn’t terribly unfeasible.

Hours later, Brooke was released from the hospital, and told TMZ she wasn’t abusing “illegal drugs”, but it looks like now she might be coming clean on just what she was doing.

Brooke is coming clean to her closest friends … admitting she WAS abusing prescription medication before she was rushed to the hospital last week … TMZ has learned.

Mueller has been telling her friends … she has a valid prescription for Adderall to treat her attention deficit hyperactivity disorder … but admits she “fell off the wagon” last week and took way more than her prescribed dosage.

According to reports, Adderall is one of the most addictive and abused prescription drugs in America — mainly because of its cocaine-like effects.

Our sources tell us, Brooke — who’s now in the jewelry business — took the pills because she was desperate to meet a deadline for a jewelry order … and didn’t think she could afford to waste time sleeping.

We reached out to Mueller — but she had no comment.

These pictures here were taken on Thursday, just hours before her incident Friday morning. I commented then about how out of touch she looks in these pictures. She looks like she’s already on something here!

Source, Photos: FameFlynet