From TMZ:Rapper Pimp C died as a result of a pre-existing condition of sleep apnea, combined with an elevated amounts of prescription codeine in his blood. His death has been ruled accidental, according spokesperson Ed Winter of the L.A. County Coroner’s office.

33-year-old Pimp C, whose real name was Chad Butler, was one half of the rap duo UGK. He was found dead in his bed at the Mondrian Hotel in Hollywood in early December.