I worked with a set of identical twin paramedics......they had separate lives and had different scheduling needs....but.....they would occasionally get the same shift.....it would lead to some amusing conversions with the drunks and the confused. You shouldn't laugh but some very funny things came out of peoples mouths.
Only one person was very disturbed.....they were slightly paranoid and though the ER was a cloning factory.
My identical twin sister and I were not allowed to work on the same unit, although it did happen on occasion. She worked 3-11, I worked 11-7 and since I am an RN, she's an LPN, our duties/responsibilities were, of course, different. This led to mass confusion with patients who would say, well, you couldn't give me my IV meds 2 hours ago, but you can now?? WHY??!! Or, oh, wow, you are working some loonngg shifts aren't you! etc. It was fun!!!!
I often float to our med/surg floor & recently figured out we have twins working there. I kept getting them mixed up & confusing their assignments. One is an LPN, one is an RN. I finally saw them together at the desk & said "What!? Are you twins? That explains a lot!" I had worked with them before, but never together on the same shift.