The OC star made headlines earlier this year after disturbing footage of her while on drugs was leaked.
On January 26, Barton was hospitalised at Cedars-Sinai Medical Center in Los Angeles, the morning after her birthday celebrations.
In a statement given to PEOPLE , Barton confirmed that she has been released from the hospital — and reveals that someone gave her GHB while she was drinking.
'On the evening of the 25th, I went out with a group of friends to celebrate my birthday. While having drinks, I realised that something was not right as my behaviour was becoming erratic and continued to intensify over the next several hours,' she said in the statement.
'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,' the statement continued. 'I would like to extend a big thanks of gratitude to the professionals at Cedars-Sinai for their great care and professionalism.'
This article originally appeared on New Idea.