Since dx I have struggled with anemia related to iron. My HGB I always low despite taking extra iron pills and a multivitamin. At my last aapt my HGB was 9.5 and I told the Onc the fatigue is killing me. I am tired of being tired! I had been taking the iron pills for almost a year with virtually no change in my HGB, in fact it just keeps going down. So he suggested that since it was below 10 I try a few bags of IV Iron. He said some people just do not absord the oral Iron and that looks to be the case with me. In the beginning of March I got 2 bags of Iron. I know people on here have said they could feel the difference from the iron pretty quickly - I was disappointed when it took me about a week to feel the difference (When I think quickly I think the next day) but was happy to finally have some energy. It has now been about 6 weeks and I am really starting to drag again. So for anyone out there that has gotten the IV Iron, how long does it last before you need a refill?