It was revealed that Lisa Marie Presley died at age 54 in January of a small bowel obstruction caused by weight loss surgery, and opioids were also found in her system.

Elvis Presley’s daughter, according to the “Daily Mail”, was rushed to the hospital on January 12 after suffering a cardiac arrest. The Los Angeles County Coroner’s report reveals that the star died of an obstruction of the small intestine (ileus), as a “result of a previous illness or injury.”

According to toxicology results, opioids such as oxycodone and buprenorphine, which is used to treat opioid addiction, were also found in her blood. There were also “traces” of quetiapine, an antipsychotic drug, according to TMZ.

The medical examiner reports that no drugs were found in her home and her urine toxicology test was negative.

The report confirms that Lisa had plastic surgery months before her death and was prescribed opioids, with the star having a history of “over-prescribing”, often forgetting she had taken her medication and then taking it again. The report also states that the star had a “history of alcohol and drug abuse.”

Lisa Marie, who was a singer-songwriter with three studio albums between 2003 and 2012, had just attended the 80th Golden Globe Awards in Los Angeles with her mother Priscilla two days before her death.

Sources told TMZ that Lisa Marie was found unconscious in her bedroom by her housekeeper and that her ex-husband, Danny Keough, with whom she lived, performed CPR until paramedics arrived. The source added that “someone administered epinephrine,” better known as adrenaline, to help Lisa Marie regain a pulse.