Lana Clarkson:
Clarkson was forced to take a minimum wage job serving the people that  she hoped were her peers. The earnings for that job were insufficient to  pay for her cottage, a car with insurance, her utilities, food and her  Vicadin addiction.
...
There are other unflattering things that came out about Clarkson. She  often raided medicine cabinets of her friends in search of drugs for her  addiction. She swindled several friends out of as much as $60,000.00 to  finance a vanity film she wanted to use as a demo to showcase her act.  The demo tape was an entertainment disaster. I’m sure she expected her  stalled career to move and she’d pay back her friends in full. It just  did not happen.
http://www.crimefilenews.com/2009/03/lana-clarksons-life-and-death-onthe.html
Diane Ogden:
One of the women, Dianne Ogden, died of an accidental overdose of  prescription medication after the first trial, which ended in a hung  jury.
http://www.latimes.com/news/local/la-me-philspector-2008sep17,0,826817.story
Leonard Cohen:
Prescription drug abuse and illegal drug abuse - meth, heroin, LSD ...
http://1heckofaguy.com/2009/04/30/leonard-cohens-list-of-pharmaceuticals-joke-his-not-at-all-funny-depresion/