Carrie Fisher had cocaine in her system when she fell ill on a plane last year, her post-mortem examination report shows, but investigators could not determine what impact the cocaine and other drugs found in the actress’s system had on her death.

The report released on Monday states Fisher may have taken cocaine three days before the December 23 flight on which she became ill.

She died four days later.

Fisher died four days after falling ill on a plane in December (Anthony Devlin/PA)
Fisher died four days after falling ill on a plane in December (Anthony Devlin/PA)

The report also found traces of heroin and MDMA, which is also known as ecstasy, but that they could not determine when Fisher had taken those drugs.

The findings were based on toxicology screenings done on samples taken when the Star Wars actress arrived at a Los Angeles hospital.

Coroner’s officials ruled Fisher died from sleep apnoea and a combination of other factors.

Fisher long battled drug addiction and mental illness (Ian West/PA)
Fisher long battled drug addiction and mental illness (Ian West/PA)

A news release issued on Friday mentioned drugs were found in Fisher’s system, but it did not provide details.

Monday’s full report contains a detailed explanation of the results, such as why investigators believe Fisher took cocaine at least three days before her flight.

“At this time the significance of cocaine cannot be established in this case,” the report states.

It also states that while heroin is detectable in the system, investigators could not determine when Fisher took it or the ecstasy.

Toxicology tests also found other opiates in Fisher’s system, including morphine, although the report states the morphine could have been a by-product of heroin.

The report states: “Ms Fisher suffered what appeared to be a cardiac arrest on the airplane accompanied by vomiting and with a history of sleep apnea. Based on the available toxicological information, we cannot establish the significance of the multiple substances that were detected in Ms Fisher’s blood and tissue, with regard to the cause of death.”