Experience with leukine, an immune system booster

Has anyone heard anything about or had any experience using leukine, which is similar to nupogen in that boosts your WBC during chemo? Because of my low blood count and recurring infection in my breast which had the lumpectomy, my doctors want me on this drug for my 3rd an 4th A/C treatments. I am wondering how others felt on it and what kind of side effects there might be from it. This has been such a useful site for sharing information; I appreciate all the support from folks who've "been there and done that." I'm sending you all good wishes. - Gay