The Ghost actress is allegedly on "total lockdown" at the Cirque Lodge addiction treatment facility, which she secretly entered shortly after collapsing at her LA home on January 23.
Moore, who was allegedly treated for anorexia and exhaustion, gathered her belongings and headed to Utah upon being released from hospital on January 26.
"She's on total lockdown and only talking to a small group of people," a source told E!. "It became clear to her that her way of coping with her stress was not working and she needed more help."
According to a 911 call made upon her collapse, Moore "smoked something" prior to falling ill.
Other sources have suggested that the 49-year-old's troubles extend beyond her divorce from Ashton Kutcher last November.