Robin Williams was struggling with his Parkinson's diagnosis, which he reportedly received five months before his death—but multiple sources tell TMZ that the diagnosis wasn't the reason for his suicide, though it did "exacerbate" the chronic depression he'd lived with for so long. Parkinson's itself is also thought to trigger depression physiologically, and the drugs Williams was taking also had a negative effect on his emotions. But a bigger trigger for Williams' suicide? According to TMZ's sources, the cancellation of Williams' TV show, The Crazy Ones, after just one season.
He was "devastated" when the series was canceled, they say, and went into a tailspin that ultimately led to his death. He entered the Hazelden Addiction Treatment Center last month to try to deal with the depression, not substance abuse, they say. "My face is all over town [on billboards] and it's all on my back," Williams reportedly told one friend about the show. Sources say he saw the cancellation as a "personal failure," and was also depressed about how difficult it was to find work in Hollywood at his age. (Michael J. Fox said he was "stunned" to learn Williams also suffered from Parkinson's.)