Elvis Presley tragically passed away on August 16, 1977, at 42 years old. His cause of death was ruled to be cardiac arrhythmia potentially caused by an interaction between an antihistamine, codeine,

There have been several theories over the years as to the main cause of Elvis Presley's untimely death at just 42 on August 16, 1977.The King of Rock and Roll died of a heart attack while reading on the toilet of his ensuite bathroom at Graceland after months of weight gain and prescription drug addiction contributed to already present health problems.