sage230.jpg Sylvester Stallone's son Sage died of heart disease, the Los Angeles County Coroner announced Thursday.

The 36-year-old eldest son of the action star died suddenly in July, with many speculating that prescription drugs might have caused his untimely demise. After a full autopsy and toxicology exam, it was determined that the major cause of death was atherosclerotic coronary artery disease. Small traces of Vicodin were also found in his system, but there was no indication that the drug had anything to do with his passing.

According to friends and family, the movie distributor lived an extremely unhealthy lifestyle filled with junk food, soda, and cigarettes. There have also been unconfirmed reports that Sage was diagnosed with a heart murmur in his childhood years.

Sage was laid to rest on July 21 in Los Angeles.