You would be surprised at the amount of mediacations/drugs that a seasoned drug user can injest and still walk, talk and function.
A body builds up an immunity to it, and it's a fine line from high to dead with these individuals.
Also, there are so many "pill mills" on Florida that if she had the money she could go from one clinic to the next.
Last night on the Dr. Drew show, they showed people lined up outside of these clinics in Florida, and also interview a young man that had noticable, infected track lines on his arm that had just walked out with a prescription for his "meds".
They can sell em at a huge profit, have the $350 or more to get into these clinics for their intial exam, and go on to the next one.