Her rep. says the mother of 14 entered the Chapman House Treatment Center last week because of "anxiety, exhaustion, and stress" linked to a Xanax addiction.
"She will be in treatment for 28 days or more if needed."
Her 14 children will reportedly be cared for by their 3 nannies during her stay.
Back in April, Suleman, 37, filed for bankruptcy, saying in court documents that she had $50,000 in assets and up to $1 million in debts.
The bankruptcy case was later tossed out after she failed to complete the necessary paperwork showing she couldn't pay off her debts.
That paved the way for creditors to resume their collections and for foreclosure proceedings to move forward on her La Habra home.
In an effort to make ends meet, Suleman shot a solo sex tape entitled "Octomom: Home Alone" that was released online in June.
It wasn't clear how much she was expected to make from the video.
TMZ reported that Suleman was trying to book as many jobs as possible in case her fans didn't come through with donations.