I am a fairly new nurse and have a question. I had a pt receiving a lasix drip today and the receiving zosyn. We only have 1 IV site. I looked up compatibilty and it says Y-site compatible. My question is this: what is the difference b/t y-site compatibe and Piggybacking it if they are both mixing in the same line? Is there a difference, b/c I never see piggyback compatible on the IV Compatibility chart..I only see Y-site or injectable in same solution, etc. Thanks!