Not trying to call either of you out, just wanting to highlight that suggesting an addiction problem is more or less severe due simply to the substance being consumed is kind of faulty. The underlying problem, addiction, is still the same, and while the affects of some substances or behaviors may be more severe or damage the person more rapidly, ultimately a heroin addiction, a cocaine addiction, an alcohol addiction, or a gambling addiction, etc. are all just different permutations of the base illness.
This is awful and I hope she gets the help she needs, addiction is horrible, destructive, and debilitating in all its forms.