Nearly a month after his shocking death, Philip Seymour Hoffman's official cause of death has been released.

According to the New York medical examiner, acute mixed drug intoxication was to blame for the actor's death, with heroin, cocaine, benzodiazephines and amphetamine found in his system.

One of the drugs, benzodiazephine, is a psychoactive drug with sedative and muscle relaxant properties that has been used to treat anxiety disorders.

Celebrities Attend The Funeral Of Philip Seymour Hoffman

Hoffman is not the first A-list actor to take a fatal mix of heroin and cocaine, known as "speedballing." River Phoenix, John Belushi and Chris Farley all died before the age of 34 from similar drug overdoses.

The Oscar winner was found dead on Feb. 2 in his New York City apartment, where investigators reportedly found 70 bags of heroin and 20 used syringes. He leaves behind three young children.