I am studying sample dosage calc questions for an upcoming test. I have never seen the following type of question before. I have combed through my D.A. book and there is nothing like it. Here is the question: The physician has prescribed 1000 mL of D5W with 10 units of Oxytocin to be infused at a rate of 14 mlu/min. Using an IV administration set that delivers 60 microdrops/mL, at how many microdrops/min will you infuse the IV? One of my classmates says we have to use a conversion factor of 1 unit/1000 mLu, but she didn't know why 1 unit = 1000 mLu. Can someone explain this to me. I have always been able to figure out any question that involves D.A., but I just don't understand how to arrive at this conversion factor. Thanks!