Locklear was released from police custody on Monday morning after spending 12 hours in custody after allegedly attacking a police officer who tried to break up a fight between her and a family member in her home.
Locklear was initially taken to a hospital to receive treatment, and she was later taken to jail, where she was held on $20,000 bail.
Actress Heather Locklear has been arrested again, accused of battery on an officer and emergency personnel.
In February, she was arrested after a domestic dispute with her boyfriend, and she allegedly assaulted an officer.
Sources told TMZ that Locklear is in a stable condition and receiving treatment. Authorities were called when Heather said she had taken prescription medication and there [were] concerns she had taken more than she had been prescribed.
The type of hold she is reported to have been placed on, known as a "5250", can last up to two weeks and include a mental evaluation and five-day detoxification process. "She was married to Tommy Lee and Richie Sambora... they made her f-king insane", he said, according to Radar Online.
After being evaluated at a nearby hospital, Locklear was transported to jail and booked.
She is due to appear in court on Tuesday.
When she was released, Locklear sources told People that she would be returning to the hospital to get the help she needs.
The pair began dating in real life in 2007 after playing onscreen love interests on Melrose Place, before ultimately splitting in 2011. She says that this behavior is not characteristic of who Locklear is as a person.
Locklear's former flame, actor Jack Wagner, issued a statement after she underwent psychiatric assessment earlier this month.