The Los Angeles Times reports an autopsy found that Petty had several drugs in his system, Petty had been prescribed the drugs to treat emphysema, knee issues, a fractured hip and coronary artery atherosclerosis - a buildup of plaque that restricts blood flow to the arteries that supply the heart with blood.
Petty's widow, Dana, and daughter, Adria, said, "Our family sat together this morning with the Medical Examiner - Coroner's office and we were informed of their final analysis that Tom Petty passed away due to an accidental drug overdose as a result of taking a variety of medications," begin Dana and Adria. "Unfortunately Tom's body suffered from many serious ailments including emphysema, knee problems and, most significantly, a fractured hip.
"Despite this painful injury, he insisted on keeping his commitment to his fans and he toured for 53 dates with a fractured hip and, as he did, it worsened to a more serious injury. On the day he died, he was informed his hip had graduated to a full on break, and it is our feeling that the pain was simply unbearable and was the cause for his over use of medication.