Thank you to all the replies!
I certainly have appericated them! To fill you all in...
The evening staff that I worked with were outraged when they found out what had happened. I was told today after I left 3 of my co-workers that i work with regularly approached him - the nurse that was going on about the dilantin filter - and basically told him to shove it up his .... and gave him lots of grief. On days, the nurse that started the dilantin IV line gave him a few words too! Then our assistant manager talked to him and basically he was wrong. Our pharmacy backed me up 100%. Tonight, he apologized to me in front of the evening staff, which I tried to gracously accept. I was a little disappointed, I found ton of articles to support the filter thing. At our facility we are required to use a 0.22 or 0.45 micron filter somewhere on the IV line, don't matter where as long as its on it. When I asked our manager about the status of the report she said she hadn't talked to him and I told her what he said and that i didn't appericate it. I felt that type of critism didn't make me a better nurse or a better collegue. Which she agreed to. However, since the apology I left a note for her saying that he apologized and I'm okay with that. So I don't know what will happen now. As for the IV bag, I take responsiblity for it, it was my fault, no excuse... - upon thinking about it I know kinda why the mistake happened, the IV fluid was wrong for this pt to be ordered , but whatever it was what was ordered.
To the poster above me, I do have a backbone, I'm not the typical nurse that my school advocates for, the shy take anything doormat... if I think I'm right, I'll fight it. And I'm right, so I feel vindicated. And two, I couldn't believe how many people stood up on my behalf. It gave me a shock, maybe I'm being accepted as a good nurse and co-worker. I certainly hope so.