Mischa Barton Hospitalized

Former “O.C.” star Mischa Barton spent the weekend in an L.A. hospital after mixing booze with prescription antibiotics. TMZ reports:

[Barton] was at a friend’s Memorial Day BBQ enjoying a few holiday cocktails when she began to feel extremely ill.

Mischa, who has been quite sick with bronchitis since traveling to Cannes, London and Paris the past several weeks, apparently didn’t [know] that you can’t drink alcohol while taking antibiotics!

The 21-year-old celeb was rushed to an undisclosed medical facility in Los Angeles.