My wife is on just as many prescriptions as Murphy was, completely legally for legitimate reasons. It is entirely possible to accidentally take second doses when she loses track. An accidental OD not out of the question. To assume she was a doper assumes that my wife and everyone else with continuing medical problems are dopers.
Then there is rapid onset appendicitis, same thing happened to Glenn Beck while on the air. News said she complained about sharp stomach pains a few hours before being found dead.
Then of course if she had an eating disorder there is always complications there.
How about waiting for an autopsy before casting judgment.
I heard a news report that she had diabetes. If you have diabetes and you’re that young, your body is vulnerable to even the least imbalance. So let’s be somewhat charitable. I enjoyed her work and to my knowledge, she didn’t hurt anybody and was pleasant to work with (unlike some of the Hollywood prima donas).