Re: med error i think
I'm sorry this happened to you
You have learned three important lessons here that you'll probably never forget after this:
1. NEVER EVER leave a narcotic out. If it's not in your hand ready to give to a patient, it should be replaced and locked in the narcotics cabinet/PYXIS/wherever you store them, or immediately wasted. IMO, better to waste a narc than risk it going missing. You'd be surprised how many people have access to offices that "only you" have access to, and what if the narc went missing? Guess who's the one to blame--YOU for the missing narc if you signed it out.
2. If you didn't give a med for any reason, you need to immediately document it. The patient not being there is a valid reason not to give a med, so you should have written something to the effect of "medication not given; pt off of floor, medication replaced/wasted". Then let your charge nurse know immediately as well as the next shift's nurse when they come on.
3. Even in the best working environments where everyone pulls together as one happy team, you always remain responsible and accountable for your duties. I'm not saying you're never going to be able to trust your coworker when you ask them to do something for you or they offer to do it...but keep in mind that that is delegating, and therefore you are still held accountable for the task being done. So if you do hand off a task to someone else, be sure to follow-up on it.
Learn from this experience and use it to improve yourself. We all make mistakes, even the best of us

And I'd be wary of any place that gives you minimal or no orientation!
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