
According to sources at TMZ, AM's doctors prescribed Xanax to him to help him overcome his fear of flying--something he had to do frequently for work.
But unfortunately the benzodiazepines triggered a relapse into addiction and he began to overuse them. It didn't help that he was also using crack cocaine. The combination of the cocaine and the benzo's became a lethal cocktail.
TMZ also reports that the alleged overdose had "absolutely nothing to do with his recent breakup."
It's so tragic that he survived a plane crash but his addiction to the medication from the crash is what ultimately took his life.
[source]