"Do we actually know that her nurse is an RN in good standing?"
That's what I was thinking. It seems that anymore anyone who cares for someone in his/her home or an institution or just works in a doctor's office calls herself a nurse, usually wears white or scrubs, and slings a stethescope around her neck. I've seen these outfits and stethescopes worn outside while walking down a street by both men and women. Always makes me laugh and wonder.
IMO, An RN (Registered Nurse) in good standing would not allow herself to be around drugs in that quantity. She would know that liquid Methadone is not prescribed to individuals in a quantity resevered for clincs, hospitals and pharmacies, plus she would easily see the quanitiy consumed and know it was drug abuse.