The Greenville County Coroner’s Office has ruled actor Hayden Panettiere’s death an accident caused by the toxic effects of fentanyl and four other substances, providing the first official account of why the 36-year-old performer died last month.

The finding, released Tuesday, identifies fentanyl, 4-ANPP, alprazolam, methocarbamol and quetiapine as contributing to the fatal toxicity. The office said an autopsy found no trauma that contributed to her death. The ruling was reported independently by the Associated Press, ABC News and The Guardian.

Panettiere was found unresponsive at an apartment in Greenville, South Carolina, on Aug. 16. Emergency crews performed CPR and other advanced resuscitation efforts for more than 40 minutes before she was pronounced dead, according to the AP. Greenville police said Tuesday that their investigation remains open, while officials have said there were no signs of foul play or suspicious circumstances.

What the ruling establishes

The coroner classified the manner of death as accidental. That is a medical-legal conclusion about the circumstances surrounding a death; it does not, by itself, resolve every factual question in an active police inquiry. A representative for Panettiere’s family told the AP that the investigation was continuing and described the case as complex.

The office’s initial public statement did not release the full autopsy or explain how each substance contributed. Fentanyl is a synthetic opioid. Alprazolam, commonly sold under the brand name Xanax, is a benzodiazepine prescribed for anxiety and panic disorders. Methocarbamol is a muscle relaxant, while quetiapine is used for several mental-health conditions. 4-ANPP is a chemical associated with fentanyl production and metabolism.

Federal health guidance provides context but cannot substitute for the case-specific toxicology findings. The National Institute on Drug Abuse warns that combining opioids and benzodiazepines can increase overdose risk because both can produce sedation and suppress breathing. Its guidance is a general explanation, not an assessment of Panettiere’s treatment, prescriptions or intent.

The coroner’s ruling therefore establishes accidental toxic effects from multiple substances, but it should not be read as evidence about where the drugs came from or how they were taken. Those details were not included in the public findings reviewed for this report. Variety likewise reported the official list of substances and the accidental classification without assigning a source or motive.

A career that began in childhood

Panettiere’s death ended a career that stretched from childhood commercials and daytime television to some of the most recognizable network dramas of the 2000s and 2010s. She played Lizzie Spaulding on “Guiding Light” before gaining wider notice in films including “Remember the Titans” and “Racing Stripes.”

Her defining television breakthrough came as Claire Bennet, the cheerleader with regenerative powers in NBC’s “Heroes.” The role placed her at the center of a major broadcast hit and made her one of the show’s most visible young performers. She later starred opposite Connie Britton in “Nashville” as country singer Juliette Barnes, a performance that earned two Golden Globe nominations. Panettiere performed her own songs on the series, which also produced charting music and live tours.

Her film credits included “Scream 4” and “Scream VI.” The latter marked a prominent return to screen acting after a period in which she had stepped back from work and publicly discussed addiction, depression and treatment. In May, she released the memoir “This Is Me: A Reckoning,” revisiting the pressures of early fame, her health struggles and the death of her younger brother, actor Jansen Panettiere, in 2023.

Context without speculation

The prominence of fentanyl in the coroner’s findings places the death within a broader public-health crisis, though an individual case should not be used to draw conclusions about national trends. The Centers for Disease Control and Prevention’s latest provisional system tracks overdose deaths only after records are received and processed; the agency cautions that toxicology investigations create reporting delays and that early counts can be incomplete.

National overdose deaths have declined from their recent peak, according to CDC estimates, but synthetic opioids remain involved in tens of thousands of deaths. That statistical backdrop helps explain the public significance of the coroner’s finding. It does not establish the circumstances of Panettiere’s death beyond what Greenville officials have released.

That distinction matters because Panettiere discussed addiction and mental health publicly throughout her adult life. Those disclosures are part of the record, but they do not authorize speculation about her final hours. The verified facts are narrower: she died Aug. 16, the coroner found no contributing trauma, the death was ruled accidental, and toxicology identified a combination that included fentanyl and alprazolam.

For the entertainment industry, the ruling closes one major question while reinforcing the breadth of Panettiere’s legacy. Her work moved from soap operas to superhero television, music drama and horror films, and her later public life included unusually candid accounts of the costs of child stardom. The police investigation remains open, leaving any further conclusions to the authorities and the complete record they may eventually release.