What killed him was the mix of different type of drugs. Everyone needs to know one thing nothing is good if not taken in a responsible manner.
Whether is Sugar, Salt, Greasy Foods, Alcohol, Pharmaceutical drugs, Cocaine, Pot, Playing video games, Cigarrettes and Cigars which I'am one that smokes but thats my choice. All of these and more can harm you if taken in a irresponsible manner.
It's all in how you consume whatever it is. period!