<human>: First post here, thanks in advance for reading. Really grateful for any insight.  
  
My mother (62) recently went to a hospital for a routine surgery. After the surgery, the surgeon advised me that he was unable to perform the entirety of the procedure (which was an invasive abdominal incision), and due to minor complications had to postpone the second portion (back incision) 1-2 days later. After the second surgery she was moved from the ICU to a room, where they helped manage her pain.  
  
She has a very low tolerance for pain medication and an equally low pain tolerance threshold, and she was in distress. She had a 'pain button' (Dilaudid) at her disposal, which she pressed (and, unfortunately, sometimes would forget about, being drugged up as she was). The next morning I get a call from a nurse, that they had (in addition to the Dilaudid) administered 2 x 10-325 of Oxycodone, and that she had stopped breathing. They did not monitor her breathing or routinely check up on her. They gave her two pills, and left her unattended. I'm told they don't know when exactly she stopped breathing, but over a 30 minute period an ultrasound technician happen to come in to check her legs for blood clots noticed her unresponsiveness and called a code blue.  
  
They had to revive her with CPR (3 minutes / chest compressions) and rushed her to the ICU again where they (I believe) administered an opioid antagonist, after which she immediately showed signs of improvement. They then put her through a series of scans, and uncomfortable tests to rule out all other type of complications. In the end, I was told, it was probably the Oxycodone.
She is now traumatized by the event, and in even more pain (her chest). She's still in the hospital and, having already been very anxious, has been experiencing night terrors.
  
Is this a case of "This sometimes happens, unfortunately"?

Give me the gist of the text in a nutshell
<bot>: After a surgery my mother was dosed with too much Oxycodone, left unattended and unmonitored, and had to be resuscitated.