Britney's Pill Nightmare: Spears Checked Into Mental Health Facility After Struggle To Stabilize Meds

Britney Spears checked into a mental health facility after a struggle to stabilize her medications, RadarOnline.com can exclusively reveal.

The pop star, who checked into a center earlier this month, was unstable with her various medications, according to a source, who also added she "completely stopped" taking her prescriptions.

Britney is said to have gotten off track amid her dad Jamie's health woes.

"Prior to Jamie getting ill, he would do daily phone checks with Britney and her bodyguards to make sure that she was taking meds," the source revealed.

When the famous father found out the "Toxic" singer wasn't taking her pills as advised by doctors, he told her she needed to go and get help, revealed the source, and she entered voluntarily.

Now, as RadarOnline.com reported, Britney wants to get out of the hospital to be there for her ailing dad.

But first and foremost, "Jamie wants her to be okay mentally. It is a mess," a second insider told RadarOnline.com.

RadarOnline.com readers know Britney checked into a Los Angeles-area wellness facility after she began having a "very hard time" with her father Jamie's declining health.

Though a source said the star has been advised by her mental health professionals to stay in treatment for a full 30 days, "she is certain she's ready to handle the remainder of her treatment plan at her home," a source previously claimed.

The singer has a long history of mental health problems. In 2008, her father became the conservator of her multi-million dollar estate following a long series of public breakdowns and rehab check-ins.