This is scary if it's true!

Mischa Barton landed in the hospital last Thursday after suffering what many thought was a mental breakdown, but according to the actress, her erratic behavior was caused by a date rape drug that was slipped into her drink as she celebrated her birthday.

“On the evening of the 25th, I went out with a group of friends to celebrate my birthday. While having drinks, I realized that something was not right as my behavior was becoming erratic and continued to intensify over the next several hours,” she told People.

"I voluntarily went to get professional help, and I was informed by their staff that I had been given GHB. After an overnight stay, I am home and doing well. I would like to extend a big thanks of gratitude to the professionals at Cedars-Sinai for their great care and professionalism. This is a lesson to all young women out there, be aware of your surroundings," she added.

Whatever it was, it made her act totally nuts! We're happy she's on the mend.