Mischa Barton is reflecting on a January meltdown that left her hospitalized, and tells Dr. Phil in a preview of a forthcoming interview that a hallucination was responsible for her public episode.

In January, TMZ uploaded footage that found Barton sprawled out over a fence outside of her West Hollywood home and incoherently shouting things like "Oh my God, it’s over! I feel it, and it’s angry!" and "the world shattering...Ziggy Stardust." Barton initially claimed the incident was the result of being slipped GHB — otherwise known as the date-rape drug — but now explains there was potentially more at work.

"I think it was complete hallucination," she explains. "I have no idea what I was talking about."

"Before I blacked out and don't remember anything, it was more auditory and visual — but more visual, like specks of light and stuff like that," she adds. "There's also blackout parts earlier in the night, and then I'll remember my friend saying, 'Please lay down and then it'll be gone again.' And the whole thing outside is just blackouts."

Barton told People the rant happened after a night of celebrating her 31st birthday, and that she could sense after a few drinks that something was very, very wrong.

Barton's Dr. Phil episode will air on April 3.

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