neutropenia associated with chemotherapy
"I was the rare case that was allergic to Neulasta and ended up in the ER with anaphylaxis the day after getting the injection.  After an epi-pen, many steroids, and a night in the hospital, I'm still feeling the effects of the reaction a week later.  I will now have to finish AC chemo without a white blood cell booster.  Please be careful on this medication and call your doctor at any signs of swelling or trouble breathing."