Mischa Barton the former resident hard partying high schooler of The OC is living up to her character's drug-laced ways.

Barton was rushed to the hospital after collasping at a party at one of Nicole Richie's pals home. Her rep is saying it was a reaction to a mix of antibiotics and alcohol.

We think Lindsay Lohan and Mischa should hook up and head to rehab together. Wouldn't that make a great reality show!