Showbiz
Rex Features
The Melrose Place actress was witnessed "driving erratically" while exiting a car park in Montecito on Saturday.
California Highway Patrol spokesman Tom Marshall told People: "The witness said Locklear was revving her engine loudly, and backed over a pair of sunglasses several times."
Locklear, who was described as "disoriented and impaired" by an officer at the scene, was taken to a local police station to undergo drug and alcohol tests.
Marshall said: "Alcohol was ruled out as a factor, but based on the officer's observations, we believe Locklear was under the influence of prescription medication."
The 47-year-old was arrested on suspicion of DUI and being under the influence of a controlled substance at 7pm. She was released on bail several hours later.
Locklear checked into an Arizona medical centre in June to be treated for anxiety and depression.
More: Heather Locklear, Showbiz
Related Stories
Ten Things About...
Ten Things About... Ridley ScottWe find out ten fast facts about the English producer and director.
Interviews
'Angels' Share' Ken Loach interviewKen Loach, Paul Laverty and Paul Brannigan on their whiskey-soaked comedy.
Fashion & Beauty
Duchess of Cambridge's memorable momentsFlick through a gallery of Kate Middleton's stand-out public appearances.
Celeb Birthdays
Marilyn Monroe: Life and career in picsFlick through our gallery on what would have been Marilyn's 86th birthday.
