Ventura County Sheriff Sgt. Eric Buschow would not tell CNN who was transported to the hospital.
On Monday, People reported that Locklear planned to return to the hospital to get treatment after her arrest. Last week, emergency personnel came to Locklear's home when a family member reportedly called 911 and said Locklear was looking for a gun to shoot herself.
"Heather is currently stable," an unnamed source told Us Weekly. "She didn't want to leave her home (Monday) afternoon to get further treatment that she had agreed to get earlier in the day. 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 family is asking for privacy at this time."
In February, Locklear was arrested on suspicion of domestic violence and suspicion of assault on an officer.