Sources tell TMZ that Moore's health problems are substance-abuse related and that she's seeking "further professional assistance." That was not confirmed by reps for Moore, however, who said their client was looking for help to combat fatigue.
"Because of the stresses in her life right now, Demi has chosen to seek professional assistance to treat her exhaustion and improve her overall health," said one of Moore's representatives in a statement to Moviefone. "She looks forward to getting well and is grateful for the support of her family and friends." The rep added that there was no further information available at present time.
Moore had a difficult end to 2011. The actress filed for divorce from husband Ashton Kutcher in November after nearly six years of marriage.
"As a woman, a mother and a wife, there are certain values and vows that I hold sacred, and it is in this spirit that I have chosen to move forward with my life," she told the Associated Press at the time.
UPDATE: Because of her current issues, Moore has had to drop out of "Lovelace," the biopic about the life of Linda Lovelace. She was set to cameo as Gloria Steinem in the film, which stars Amanda Seyfried as the titular porn star.
Check out some photos of Demi Moore below.