Mischa Barton's troubled 19-year-old sister suffered a drug overdose over the holidays, the National Enquirer is reporting. Hania Barton was rushed to Los Angeles' Ceder's Sinai Medical Center on December 27th suffering convulsions, the mag says. An insider revealed: "The family bodyguard found her obviously overdosed on drugs, called her mother, and then rushed Hania to the emergency room. It was a suicide attempt, and by the time she got to hospital, Hania was absolutely hysterical." Hania reportedly confessed to overdosing on the muscle relaxer Soma, and was treated for six hours before being discharged. xxxxxx (Perez) Rosemary, please do not post profanity.