What you kept to yourself is doing no one any favors. She could have killed the patient. Would you want that on your conscience?
Rhetorical questions and unveiled opinions follow:
Double Ativan dose? If the first was a large dose, and the patient had already been given a little big extra, how much did the patient actually get? Enough for an elephant? Enough to cause repiratory slowing? or worse?
Narcan isn't given for too much Ativan. Does she even understand the meds? Does she look them up?
Doesn't she have to indicate what she gave on the MAR? or in the Pyxis or other machine that dispenses meds? Isn't Ativan on the controlled substance list that requires more than signing out on the simple MAR?
How do you know all these things? Did she tell you? Did you see it happen? Did you look at the MAR? Does she know you covered for her? Isn't this a bit of a creepy pact? If she told you, or knew you knew, and you didn't confront her AND do more, well...why was this even remotely ok?
What else does she give to patients that you don't know about?
Optimist, you must report this. You must stand in your truth. I get it that your job as well as hers is at risk here, but what she did and seems to think is ok, is so dangerous. We can't just give meds because we think it's a good idea. It's so legally and morally inappropriate. We can't stick by peers who are doing something that could hurt a dependent person in terribly ways, and when it's illegal as well as twitty or stupid...well....
(I will now get off my soapbox and calm down.)