Brooke Mueller OD's, Rushed to Hospital

Brooke Mueller was rushed to an L.A. hospital this morning after OD'ing on drugs ... TMZ has learned.

The L.A. City Fire Department tells us, Brooke was transported from her home in Tarzana to a nearby hospital at 11:42 AM.

Multiple sources close to Brooke tell TMZ, she has been abusing drugs for several weeks and people around her were "deeply concerned."

Brooke is currently conscious and responsive. We do not know the severity of the overdose, nor the drug that caused it.

Brooke has long struggled with drug addiction, with more than 15 stints in rehab.

Just last night, Brooke was photographed leaving Mr. Chow's in Beverly Hills ... looking wide-eyed.