The only reason why I thought (and still do think, actually) that she was addicted to drugs/and or alcohol, is because she slurs! Even yesterday when she was on Entertainment Tonight explaining that these are all rumors and how hurt she is that people think she's an addict, she was slurring like crazy!
Slurring is a symtom of being addicted to drugs or alcohol, and she can't deny that she does that, so people have a right to be suspicious. That woman cannot complete a sentence, she stutters like crazy and it is irritating to listen to.
Now, is the slurring and stuttering a symptom of her "chronic pain" or is it a side affect of her medication (even if she does not over dose on it)?