There was no visible external injury; however, according to autopsy reports, Lee's brain had swollen considerably, from 1,400 to 1,575 grams (a 13 percent increase). The autopsy found Equagesic in his system. On October 15, 2005, Chow stated in an interview that Lee died from an allergic reaction to the tranquilizer meprobamate, the main ingredient in Equagesic, which Chow described as an ingredient commonly used in painkillers. When the doctors announced Lee's death, it was officially ruled a "death by misadventure".