Ok, here's what I've observed..
Nurse gets out med, ex: needs 2 mg morphine which is supplied in 4mg/2mL. Computer asks 'Do you plan to administer entire dose of Morphine 4mg/2mL' Nurse says 'No' then the computer ask for another username/password which would be the second 'signature' The second nurse steps in enters her username/password and hits 'continue' draw opens automatically, after that you enter the beginning count into the computer, get out the 4mg/2mL of morphine, close the draw and draw up what you need and if you do it like it is supposed to be done you waste the 1mL you do not need. At this point the second signature is supposed to be watching you squirt the rest down the sink, but in some cases the nusre is long gone. I never keep a waste quoting myself from before:
I'd be the one to pull it out of my pocket while walking to the car talking to my manager!!
If I'm wasting I ask that the other nurse watch like the law says.
But I have seen nurses put the other 1 mL (to stay with the above example) in their pocket to use it in 3 hours because the patient is in horrible pain requesting the med as soon as it is available. When I was seeing this I did open my mouth about why the witness was not there, now I try not to be near someone who is doing it improperly, for my own sake. When I am the second signature on a waste I watch the waste happen I do not walk away after entering my username and password/'signature'
But just the other day I was in the medicine room and a nurse was talking about how she had just thrown away a med she had accidentely taken home. She thought that the patient would need the med again before the end of shift so she hung on to it trying to safe herself time (I guess) but the patient did not request the med after that and she forgot she had it until at home emptying her pockets...
It's not right that this happens and I do not let it happen to me. Maybe it's been explained clearly