"She said she's gone through this before, but never this bad, and didn't have . . . her medication," one source said.
Livingston was detained and placed in federal custody, with charges pending, last night.
Last year, Livingston, a 5-foot-6 brunette from Merrimac, RI, was featured as the centerfold for the debut edition of VIP, the Singapore version of Playboy, in which she was described as "not just another pretty face.
"Tiffany boasts the immaculate poise of a mature model wrapped with a bubbly demeanor," the profile said.
Her agent did not return a call seeking comment.