The final report released Thursday states that Murphy had "elevated levels" of Vicodin and drugs from over-the-counter cold medicine in her system, but no illegal substances.
"There is no history of alcohol or drug abuse," the report reads. "The overall appearance of the body is consistent with the recorded height of 65 inches and the recorded weight of 115 pounds. The body appears well developed, normally muscular and slim but not excessively thin."
Earlier this month, the coroner said pneumonia was the primary cause of death, with multiple drug intoxication and a low-blood count as contributing factors. The coroner concluded her death was an accidental but preventable. Police have repeatedly said that no foul play is suspected.
The Clueless star, 32, was found unresponsive in her Hollywood Hills home on Dec. 20, despite frantic attempts by her husband, Simon Monjack, and her mother, Sharon, to revive her.