Autopsy shows Hayden Panettiere died from overdose of fentanyl The death of the child star - who had fentanyl, Xanax, a muscle relaxant and antipsychotic medication in her system - was ruled an accident.

Autopsy shows Hayden Panettiere died from overdose of fentanyl The death of the child star - who had fentanyl, Xanax, a muscle relaxant and antipsychotic medication in her system - was ruled an accident. The death of the child star - who had fentanyl, Xanax, a muscle relaxant and antipsychotic medication in her system - was ruled an accident.