Mischa Barton's 19 year-old sister had a drug overdose over the holidays, or so the National Enquirer is reporting. Hania Barton taken to the Ceder's Sinai Medical Center on December 27th. "The family bodyguard found her obviously overdosed on drugs, called her mother, and then rushed Hania to the emergecy room. It was a suicide attempt, and by the time she got to the hospital, Hania was absolutely hysterical. After a muscle relaxer she confessed to overdosing and was treated for six hours then released.

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