Marijuana and Vicodin Perhaps?

Mischa Barton blew a .12 on her breathalyzer test, admitted to smoking marijuana earlier that day (which cops found in her car) and had what cops say looked like prescription drugs in her car -- in an unlabeled bottle.

Barton was popped at 2:45 AM Thursday in West Hollywood. Cops pulled her over after they witnessed her "straddling two lanes of traffic and failed to signal when making a turn."

She was arrested on suspicion of DUI, possession of narcotics and driving on a suspended license. Barton was taken to the West Hollywood Sheriff's station and was released on $10,000 bail.

I really hope those pills were Vicodin so Mischa can say she was having cramps. So far, it sounds like she was on pot - just like Nicole Richie, and she had pills - just like when Nicole was arrested. How original. Gawd, let it be Vicodin! :)

tmz