Well, RB, don't feel bad because you didn't know this. And it's not really similar. She was addicted to pain killers after she hurt her back while lifting a patient (she was a RN). She was in the process of cleaning her life back up, and was clean for 7 months.
I think anxiety over a job interview caused her to relapse. She was found with a bump to her head after taking a shower, which could mean she took too much of whatever and fell. Unfortunately her boyfriend of two years was at work at the time, and found her when he got home.
I do know that she told her boyfriend said that she was going to the grocery store and then her parent's house that night, but never went to her parent's house. So, unfortunately she may have relapsed. That may hurt more, because I know my aunt and uncle are likely blaming themselves for "not doing more".